Todo: 集成多平台 解决因SaiNiu线程抢占资源问题 本地提交测试环境打包 和 正式打包脚本与正式环境打包bat 提交Python32环境包 改进多日志文件生成情况修改打包日志细节

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/column_provider.py

@@ -0,0 +1,125 @@
+# A sample shell column provider
+# Mainly ported from MSDN article:
+#  Using Shell Column Handlers for Detailed File Information,
+#  Raymond Chen, Microsoft Corporation, February 2000
+#
+# To demostrate:
+# * Execute this script to register the namespace.
+# * Open Windows Explorer
+# * Right-click an explorer column header - select "More"
+# * Locate column 'pyc size' or 'pyo size', and add it to the view.
+# This handler is providing that column data.
+import os
+import stat
+
+import commctrl
+import pythoncom
+from pywintypes import IID
+from win32com.shell import shell, shellcon
+
+IPersist_Methods = ["GetClassID"]
+IColumnProvider_Methods = IPersist_Methods + [
+    "Initialize",
+    "GetColumnInfo",
+    "GetItemData",
+]
+
+
+class ColumnProvider:
+    _reg_progid_ = "Python.ShellExtension.ColumnProvider"
+    _reg_desc_ = "Python Sample Shell Extension (Column Provider)"
+    _reg_clsid_ = IID("{0F14101A-E05E-4070-BD54-83DFA58C3D68}")
+    _com_interfaces_ = [
+        pythoncom.IID_IPersist,
+        shell.IID_IColumnProvider,
+    ]
+    _public_methods_ = IColumnProvider_Methods
+
+    # IPersist
+    def GetClassID(self):
+        return self._reg_clsid_
+
+    # IColumnProvider
+    def Initialize(self, colInit):
+        flags, reserved, name = colInit
+        print("ColumnProvider initializing for file", name)
+
+    def GetColumnInfo(self, index):
+        # We support exactly 2 columns - 'pyc size' and 'pyo size'
+        if index in [0, 1]:
+            # As per the MSDN sample, use our CLSID as the fmtid
+            if index == 0:
+                ext = ".pyc"
+            else:
+                ext = ".pyo"
+            title = ext + " size"
+            description = "Size of compiled %s file" % ext
+            col_id = (self._reg_clsid_, index)  # fmtid  # pid
+            col_info = (
+                col_id,  # scid
+                pythoncom.VT_I4,  # vt
+                commctrl.LVCFMT_RIGHT,  # fmt
+                20,  # cChars
+                shellcon.SHCOLSTATE_TYPE_INT
+                | shellcon.SHCOLSTATE_SECONDARYUI,  # csFlags
+                title,
+                description,
+            )
+            return col_info
+        return None  # Indicate no more columns.
+
+    def GetItemData(self, colid, colData):
+        fmt_id, pid = colid
+        fmt_id == self._reg_clsid_
+        flags, attr, reserved, ext, name = colData
+        if ext.lower() not in [".py", ".pyw"]:
+            return None
+        if pid == 0:
+            ext = ".pyc"
+        else:
+            ext = ".pyo"
+        check_file = os.path.splitext(name)[0] + ext
+        try:
+            st = os.stat(check_file)
+            return st[stat.ST_SIZE]
+        except OSError:
+            # No file
+            return None
+
+
+def DllRegisterServer():
+    import winreg
+
+    # Special ColumnProvider key
+    key = winreg.CreateKey(
+        winreg.HKEY_CLASSES_ROOT,
+        "Folder\\ShellEx\\ColumnHandlers\\" + str(ColumnProvider._reg_clsid_),
+    )
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, ColumnProvider._reg_desc_)
+    print(ColumnProvider._reg_desc_, "registration complete.")
+
+
+def DllUnregisterServer():
+    import winreg
+
+    try:
+        key = winreg.DeleteKey(
+            winreg.HKEY_CLASSES_ROOT,
+            "Folder\\ShellEx\\ColumnHandlers\\" + str(ColumnProvider._reg_clsid_),
+        )
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    print(ColumnProvider._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        ColumnProvider,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/context_menu.py

@@ -0,0 +1,122 @@
+# A sample context menu handler.
+# Adds a 'Hello from Python' menu entry to .py files.  When clicked, a
+# simple message box is displayed.
+#
+# To demostrate:
+# * Execute this script to register the context menu.
+# * Open Windows Explorer, and browse to a directory with a .py file.
+# * Right-Click on a .py file - locate and click on 'Hello from Python' on
+#   the context menu.
+
+import pythoncom
+import win32con
+import win32gui
+from win32com.shell import shell, shellcon
+
+
+class ShellExtension:
+    _reg_progid_ = "Python.ShellExtension.ContextMenu"
+    _reg_desc_ = "Python Sample Shell Extension (context menu)"
+    _reg_clsid_ = "{CED0336C-C9EE-4a7f-8D7F-C660393C381F}"
+    _com_interfaces_ = [shell.IID_IShellExtInit, shell.IID_IContextMenu]
+    _public_methods_ = shellcon.IContextMenu_Methods + shellcon.IShellExtInit_Methods
+
+    def Initialize(self, folder, dataobj, hkey):
+        print("Init", folder, dataobj, hkey)
+        self.dataobj = dataobj
+
+    def QueryContextMenu(self, hMenu, indexMenu, idCmdFirst, idCmdLast, uFlags):
+        print("QCM", hMenu, indexMenu, idCmdFirst, idCmdLast, uFlags)
+        # Query the items clicked on
+        format_etc = win32con.CF_HDROP, None, 1, -1, pythoncom.TYMED_HGLOBAL
+        sm = self.dataobj.GetData(format_etc)
+        num_files = shell.DragQueryFile(sm.data_handle, -1)
+        if num_files > 1:
+            msg = "&Hello from Python (with %d files selected)" % num_files
+        else:
+            fname = shell.DragQueryFile(sm.data_handle, 0)
+            msg = "&Hello from Python (with '%s' selected)" % fname
+        idCmd = idCmdFirst
+        items = ["First Python content menu item"]
+        if (
+            uFlags & 0x000F
+        ) == shellcon.CMF_NORMAL:  # Check == here, since CMF_NORMAL=0
+            print("CMF_NORMAL...")
+            items.append(msg)
+        elif uFlags & shellcon.CMF_VERBSONLY:
+            print("CMF_VERBSONLY...")
+            items.append(msg + " - shortcut")
+        elif uFlags & shellcon.CMF_EXPLORE:
+            print("CMF_EXPLORE...")
+            items.append(msg + " - normal file, right-click in Explorer")
+        elif uFlags & shellcon.CMF_DEFAULTONLY:
+            print("CMF_DEFAULTONLY...\r\n")
+        else:
+            print("** unknown flags", uFlags)
+        win32gui.InsertMenu(
+            hMenu, indexMenu, win32con.MF_SEPARATOR | win32con.MF_BYPOSITION, 0, None
+        )
+        indexMenu += 1
+        for item in items:
+            win32gui.InsertMenu(
+                hMenu,
+                indexMenu,
+                win32con.MF_STRING | win32con.MF_BYPOSITION,
+                idCmd,
+                item,
+            )
+            indexMenu += 1
+            idCmd += 1
+
+        win32gui.InsertMenu(
+            hMenu, indexMenu, win32con.MF_SEPARATOR | win32con.MF_BYPOSITION, 0, None
+        )
+        indexMenu += 1
+        return idCmd - idCmdFirst  # Must return number of menu items we added.
+
+    def InvokeCommand(self, ci):
+        mask, hwnd, verb, params, dir, nShow, hotkey, hicon = ci
+        win32gui.MessageBox(hwnd, "Hello", "Wow", win32con.MB_OK)
+
+    def GetCommandString(self, cmd, typ):
+        # If GetCommandString returns the same string for all items then
+        # the shell seems to ignore all but one.  This is even true in
+        # Win7 etc where there is no status bar (and hence this string seems
+        # ignored)
+        return "Hello from Python (cmd=%d)!!" % (cmd,)
+
+
+def DllRegisterServer():
+    import winreg
+
+    key = winreg.CreateKey(winreg.HKEY_CLASSES_ROOT, "Python.File\\shellex")
+    subkey = winreg.CreateKey(key, "ContextMenuHandlers")
+    subkey2 = winreg.CreateKey(subkey, "PythonSample")
+    winreg.SetValueEx(subkey2, None, 0, winreg.REG_SZ, ShellExtension._reg_clsid_)
+    print(ShellExtension._reg_desc_, "registration complete.")
+
+
+def DllUnregisterServer():
+    import winreg
+
+    try:
+        key = winreg.DeleteKey(
+            winreg.HKEY_CLASSES_ROOT,
+            "Python.File\\shellex\\ContextMenuHandlers\\PythonSample",
+        )
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    print(ShellExtension._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        ShellExtension,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/copy_hook.py

@@ -0,0 +1,84 @@
+# A sample shell copy hook.
+
+# To demostrate:
+# * Execute this script to register the context menu.
+# * Open Windows Explorer
+# * Attempt to move or copy a directory.
+# * Note our hook's dialog is displayed.
+
+import pythoncom
+import win32con
+import win32gui
+from win32com.shell import shell
+
+
+# Our shell extension.
+class ShellExtension:
+    _reg_progid_ = "Python.ShellExtension.CopyHook"
+    _reg_desc_ = "Python Sample Shell Extension (copy hook)"
+    _reg_clsid_ = "{1845b6ba-2bbd-4197-b930-46d8651497c1}"
+    _com_interfaces_ = [shell.IID_ICopyHook]
+    _public_methods_ = ["CopyCallBack"]
+
+    def CopyCallBack(self, hwnd, func, flags, srcName, srcAttr, destName, destAttr):
+        # This function should return:
+        # IDYES Allows the operation.
+        # IDNO Prevents the operation on this folder but continues with any other operations that have been approved (for example, a batch copy operation).
+        # IDCANCEL Prevents the current operation and cancels any pending operations.
+        print("CopyCallBack", hwnd, func, flags, srcName, srcAttr, destName, destAttr)
+        return win32gui.MessageBox(
+            hwnd, "Allow operation?", "CopyHook", win32con.MB_YESNO
+        )
+
+
+def DllRegisterServer():
+    import winreg
+
+    key = winreg.CreateKey(
+        winreg.HKEY_CLASSES_ROOT,
+        "directory\\shellex\\CopyHookHandlers\\" + ShellExtension._reg_desc_,
+    )
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, ShellExtension._reg_clsid_)
+    key = winreg.CreateKey(
+        winreg.HKEY_CLASSES_ROOT,
+        "*\\shellex\\CopyHookHandlers\\" + ShellExtension._reg_desc_,
+    )
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, ShellExtension._reg_clsid_)
+    print(ShellExtension._reg_desc_, "registration complete.")
+
+
+def DllUnregisterServer():
+    import winreg
+
+    try:
+        key = winreg.DeleteKey(
+            winreg.HKEY_CLASSES_ROOT,
+            "directory\\shellex\\CopyHookHandlers\\" + ShellExtension._reg_desc_,
+        )
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    try:
+        key = winreg.DeleteKey(
+            winreg.HKEY_CLASSES_ROOT,
+            "*\\shellex\\CopyHookHandlers\\" + ShellExtension._reg_desc_,
+        )
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    print(ShellExtension._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        ShellExtension,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )
+#!/usr/bin/env python

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/empty_volume_cache.py

@@ -0,0 +1,188 @@
+# A sample implementation of IEmptyVolumeCache - see
+# https://learn.microsoft.com/en-ca/windows/win32/lwef/disk-cleanup for an overview.
+#
+# * Execute this script to register the handler
+# * Start the "disk cleanup" tool - look for "pywin32 compiled files"
+import os
+import stat
+import sys
+
+import pythoncom
+import win32gui
+import winerror
+from win32com.server.exception import COMException
+from win32com.shell import shell, shellcon
+
+# Our shell extension.
+IEmptyVolumeCache_Methods = (
+    "Initialize GetSpaceUsed Purge ShowProperties Deactivate".split()
+)
+IEmptyVolumeCache2_Methods = "InitializeEx".split()
+
+ico = os.path.join(sys.prefix, "py.ico")
+if not os.path.isfile(ico):
+    ico = os.path.join(sys.prefix, "PC", "py.ico")
+if not os.path.isfile(ico):
+    ico = None
+    print("Can't find python.ico - no icon will be installed")
+
+
+class EmptyVolumeCache:
+    _reg_progid_ = "Python.ShellExtension.EmptyVolumeCache"
+    _reg_desc_ = "Python Sample Shell Extension (disk cleanup)"
+    _reg_clsid_ = "{EADD0777-2968-4c72-A999-2BF5F756259C}"
+    _reg_icon_ = ico
+    _com_interfaces_ = [shell.IID_IEmptyVolumeCache, shell.IID_IEmptyVolumeCache2]
+    _public_methods_ = IEmptyVolumeCache_Methods + IEmptyVolumeCache2_Methods
+
+    def Initialize(self, hkey, volume, flags):
+        # This should never be called, except on win98.
+        print("Unless we are on 98, Initialize call is unexpected!")
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def InitializeEx(self, hkey, volume, key_name, flags):
+        # Must return a tuple of:
+        # (display_name, description, button_name, flags)
+        print("InitializeEx called with", hkey, volume, key_name, flags)
+        self.volume = volume
+        if flags & shellcon.EVCF_SETTINGSMODE:
+            print("We are being run on a schedule")
+            # In this case, "because there is no opportunity for user
+            # feedback, only those files that are extremely safe to clean up
+            # should be touched. You should ignore the initialization
+            # method's pcwszVolume parameter and clean unneeded files
+            # regardless of what drive they are on."
+            self.volume = None  # flag as 'any disk will do'
+        elif flags & shellcon.EVCF_OUTOFDISKSPACE:
+            # In this case, "the handler should be aggressive about deleting
+            # files, even if it results in a performance loss. However, the
+            # handler obviously should not delete files that would cause an
+            # application to fail or the user to lose data."
+            print("We are being run as we are out of disk-space")
+        else:
+            # This case is not documented - we are guessing :)
+            print("We are being run because the user asked")
+
+        # For the sake of demo etc, we tell the shell to only show us when
+        # there are > 0 bytes available.  Our GetSpaceUsed will check the
+        # volume, so will return 0 when we are on a different disk
+        flags = shellcon.EVCF_DONTSHOWIFZERO | shellcon.EVCF_ENABLEBYDEFAULT
+
+        return (
+            "pywin32 compiled files",
+            "Removes all .pyc and .pyo files in the pywin32 directories",
+            "click me!",
+            flags,
+        )
+
+    def _GetDirectories(self):
+        root_dir = os.path.abspath(os.path.dirname(os.path.dirname(win32gui.__file__)))
+        if self.volume is not None and not root_dir.lower().startswith(
+            self.volume.lower()
+        ):
+            return []
+        return [
+            os.path.join(root_dir, p)
+            for p in ("win32", "win32com", "win32comext", "isapi")
+        ]
+
+    def _WalkCallback(self, arg, directory, files):
+        # callback function for os.path.walk - no need to be member, but it's
+        # close to the callers :)
+        callback, total_list = arg
+        for file in files:
+            fqn = os.path.join(directory, file).lower()
+            if file.endswith(".pyc") or file.endswith(".pyo"):
+                # See below - total_list is None means delete files,
+                # otherwise it is a list where the result is stored. It's a
+                # list simply due to the way os.walk works - only [0] is
+                # referenced
+                if total_list is None:
+                    print("Deleting file", fqn)
+                    # Should do callback.PurgeProcess - left as an exercise :)
+                    os.remove(fqn)
+                else:
+                    total_list[0] += os.stat(fqn)[stat.ST_SIZE]
+                    # and callback to the tool
+                    if callback:
+                        # for the sake of seeing the progress bar do its thing,
+                        # we take longer than we need to...
+                        # ACK - for some bizarre reason this screws up the XP
+                        # cleanup manager - clues welcome!! :)
+                        # # print("Looking in", directory, ", but waiting a while...")
+                        # # time.sleep(3)
+                        # now do it
+                        used = total_list[0]
+                        callback.ScanProgress(used, 0, "Looking at " + fqn)
+
+    def GetSpaceUsed(self, callback):
+        total = [0]  # See _WalkCallback above
+        try:
+            for d in self._GetDirectories():
+                os.path.walk(d, self._WalkCallback, (callback, total))
+                print("After looking in", d, "we have", total[0], "bytes")
+        except pythoncom.error as exc:
+            # This will be raised by the callback when the user selects 'cancel'.
+            if exc.hresult != winerror.E_ABORT:
+                raise  # that's the documented error code!
+            print("User cancelled the operation")
+        return total[0]
+
+    def Purge(self, amt_to_free, callback):
+        print("Purging", amt_to_free, "bytes...")
+        # we ignore amt_to_free - it is generally what we returned for
+        # GetSpaceUsed
+        try:
+            for d in self._GetDirectories():
+                os.path.walk(d, self._WalkCallback, (callback, None))
+        except pythoncom.error as exc:
+            # This will be raised by the callback when the user selects 'cancel'.
+            if exc.hresult != winerror.E_ABORT:
+                raise  # that's the documented error code!
+            print("User cancelled the operation")
+
+    def ShowProperties(self, hwnd):
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def Deactivate(self):
+        print("Deactivate called")
+        return 0
+
+
+def DllRegisterServer():
+    # Also need to register specially in:
+    # HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches
+    # See link at top of file.
+    import winreg
+
+    kn = r"Software\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\{}".format(
+        EmptyVolumeCache._reg_desc_,
+    )
+    key = winreg.CreateKey(winreg.HKEY_LOCAL_MACHINE, kn)
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, EmptyVolumeCache._reg_clsid_)
+
+
+def DllUnregisterServer():
+    import winreg
+
+    kn = r"Software\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\{}".format(
+        EmptyVolumeCache._reg_desc_,
+    )
+    try:
+        key = winreg.DeleteKey(winreg.HKEY_LOCAL_MACHINE, kn)
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    print(EmptyVolumeCache._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        EmptyVolumeCache,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/folder_view.py

@@ -0,0 +1,866 @@
+# This is a port of the Vista SDK "FolderView" sample, and associated
+# notes at https://web.archive.org/web/20081225011615/http://shellrevealed.com/blogs/shellblog/archive/2007/03/15/Shell-Namespace-Extension_3A00_-Creating-and-Using-the-System-Folder-View-Object.aspx
+# A key difference to shell_view.py is that this version uses the default
+# IShellView provided by the shell (via SHCreateShellFolderView) rather
+# than our own.
+# XXX - sadly, it doesn't work quite like the original sample.  Oh well,
+# another day...
+import os
+import pickle
+import random
+import sys
+
+import commctrl
+import pythoncom
+import win32api
+import win32con
+import win32gui
+import winerror
+from win32com.axcontrol import axcontrol  # IObjectWithSite
+from win32com.propsys import propsys
+from win32com.server.exception import COMException
+from win32com.server.util import NewEnum as _NewEnum, wrap as _wrap
+from win32com.shell import shell, shellcon
+
+GUID = pythoncom.MakeIID
+
+# If set, output spews to the win32traceutil collector...
+debug = 0
+
+
+# wrap a python object in a COM pointer
+def wrap(ob, iid=None):
+    return _wrap(ob, iid, useDispatcher=(debug > 0))
+
+
+def NewEnum(seq, iid):
+    return _NewEnum(seq, iid=iid, useDispatcher=(debug > 0))
+
+
+# The sample makes heavy use of "string ids" (ie, integer IDs defined in .h
+# files, loaded at runtime from a (presumably localized) DLL.  We cheat.
+_sids = {}  # strings, indexed bystring_id,
+
+
+def LoadString(sid):
+    return _sids[sid]
+
+
+# fn to create a unique string ID
+_last_ids = 0
+
+
+def _make_ids(s):
+    global _last_ids
+    _last_ids += 1
+    _sids[_last_ids] = s
+    return _last_ids
+
+
+# These strings are what the user sees and would be localized.
+# XXX - it's possible that the shell might persist these values, so
+# this scheme wouldn't really be suitable in a real ap.
+IDS_UNSPECIFIED = _make_ids("unspecified")
+IDS_SMALL = _make_ids("small")
+IDS_MEDIUM = _make_ids("medium")
+IDS_LARGE = _make_ids("large")
+IDS_CIRCLE = _make_ids("circle")
+IDS_TRIANGLE = _make_ids("triangle")
+IDS_RECTANGLE = _make_ids("rectangle")
+IDS_POLYGON = _make_ids("polygon")
+IDS_DISPLAY = _make_ids("Display")
+IDS_DISPLAY_TT = _make_ids("Display the item.")
+IDS_SETTINGS = _make_ids("Settings")
+IDS_SETTING1 = _make_ids("Setting 1")
+IDS_SETTING2 = _make_ids("Setting 2")
+IDS_SETTING3 = _make_ids("Setting 3")
+IDS_SETTINGS_TT = _make_ids("Modify settings.")
+IDS_SETTING1_TT = _make_ids("Modify setting 1.")
+IDS_SETTING2_TT = _make_ids("Modify setting 2.")
+IDS_SETTING3_TT = _make_ids("Modify setting 3.")
+IDS_LESSTHAN5 = _make_ids("Less Than 5")
+IDS_5ORGREATER = _make_ids("Five or Greater")
+del _make_ids, _last_ids
+
+# Other misc resource stuff
+IDI_ICON1 = 100
+IDI_SETTINGS = 101
+
+# The sample defines a number of "category ids".  Each one gets
+# its own GUID.
+CAT_GUID_NAME = GUID("{de094c9d-c65a-11dc-ba21-005056c00008}")
+CAT_GUID_SIZE = GUID("{de094c9e-c65a-11dc-ba21-005056c00008}")
+CAT_GUID_SIDES = GUID("{de094c9f-c65a-11dc-ba21-005056c00008}")
+CAT_GUID_LEVEL = GUID("{de094ca0-c65a-11dc-ba21-005056c00008}")
+# The next category guid is NOT based on a column (see
+# ViewCategoryProvider::EnumCategories()...)
+CAT_GUID_VALUE = "{de094ca1-c65a-11dc-ba21-005056c00008}"
+
+GUID_Display = GUID("{4d6c2fdd-c689-11dc-ba21-005056c00008}")
+GUID_Settings = GUID("{4d6c2fde-c689-11dc-ba21-005056c00008}")
+GUID_Setting1 = GUID("{4d6c2fdf-c689-11dc-ba21-005056c00008}")
+GUID_Setting2 = GUID("{4d6c2fe0-c689-11dc-ba21-005056c00008}")
+GUID_Setting3 = GUID("{4d6c2fe1-c689-11dc-ba21-005056c00008}")
+
+# Hrm - not sure what to do about the std keys.
+# Probably need a simple parser for propkey.h
+PKEY_ItemNameDisplay = ("{B725F130-47EF-101A-A5F1-02608C9EEBAC}", 10)
+PKEY_PropList_PreviewDetails = ("{C9944A21-A406-48FE-8225-AEC7E24C211B}", 8)
+
+# Not sure what the "3" here refers to - docs say PID_FIRST_USABLE (2) be
+# used.  Presumably it is the 'propID' value in the .propdesc file!
+# note that the following GUIDs are also references in the .propdesc file
+PID_SOMETHING = 3
+# These are our 'private' PKEYs
+# Col 2, name="Sample.AreaSize"
+PKEY_Sample_AreaSize = ("{d6f5e341-c65c-11dc-ba21-005056c00008}", PID_SOMETHING)
+# Col 3, name="Sample.NumberOfSides"
+PKEY_Sample_NumberOfSides = ("{d6f5e342-c65c-11dc-ba21-005056c00008}", PID_SOMETHING)
+# Col 4, name="Sample.DirectoryLevel"
+PKEY_Sample_DirectoryLevel = ("{d6f5e343-c65c-11dc-ba21-005056c00008}", PID_SOMETHING)
+
+
+# We construct a PIDL from a pickle of a dict - turn it back into a
+# dict (we should *never* be called with a PIDL that the last elt is not
+# ours, so it is safe to assume we created it (assume->"ass" = "u" + "me" :)
+def pidl_to_item(pidl):
+    # Note that only the *last* elt in the PIDL is certainly ours,
+    # but it contains everything we need encoded as a dict.
+    return pickle.loads(pidl[-1])
+
+
+# Start of msdn sample port...
+# make_item_enum replaces the sample's entire EnumIDList.cpp :)
+def make_item_enum(level, flags):
+    pidls = []
+    nums = """zero one two three four five size seven eight nine ten""".split()
+    for i, name in enumerate(nums):
+        size = random.randint(0, 255)
+        sides = 1
+        while sides in [1, 2]:
+            sides = random.randint(0, 5)
+        is_folder = (i % 2) != 0
+        # check the flags say to include it.
+        # (This seems strange; if you ask the same folder for, but appear
+        skip = False
+        if not (flags & shellcon.SHCONTF_STORAGE):
+            if is_folder:
+                skip = not (flags & shellcon.SHCONTF_FOLDERS)
+            else:
+                skip = not (flags & shellcon.SHCONTF_NONFOLDERS)
+        if not skip:
+            data = {
+                "name": name,
+                "size": size,
+                "sides": sides,
+                "level": level,
+                "is_folder": is_folder,
+            }
+            pidls.append([pickle.dumps(data)])
+    return NewEnum(pidls, shell.IID_IEnumIDList)
+
+
+# start of Utils.cpp port
+def DisplayItem(shell_item_array, hwnd_parent=0):
+    # Get the first ShellItem and display its name
+    if shell_item_array is None:
+        msg = "You must select something!"
+    else:
+        si = shell_item_array.GetItemAt(0)
+        name = si.GetDisplayName(shellcon.SIGDN_NORMALDISPLAY)
+        msg = "%d items selected, first is %r" % (shell_item_array.GetCount(), name)
+    win32gui.MessageBox(hwnd_parent, msg, "Hello", win32con.MB_OK)
+
+
+# end of Utils.cpp port
+
+
+# start of sample's FVCommands.cpp port
+class Command:
+    def __init__(self, guid, ids, ids_tt, idi, flags, callback, children):
+        self.guid = guid
+        self.ids = ids
+        self.ids_tt = ids_tt
+        self.idi = idi
+        self.flags = flags
+        self.callback = callback
+        self.children = children
+        assert not children or isinstance(children[0], Command)
+
+    def tuple(self):
+        return (
+            self.guid,
+            self.ids,
+            self.ids_tt,
+            self.idi,
+            self.flags,
+            self.callback,
+            self.children,
+        )
+
+
+# command callbacks - called back directly by us - see ExplorerCommand.Invoke
+def onDisplay(items, bindctx):
+    DisplayItem(items)
+
+
+def onSetting1(items, bindctx):
+    win32gui.MessageBox(0, LoadString(IDS_SETTING1), "Hello", win32con.MB_OK)
+
+
+def onSetting2(items, bindctx):
+    win32gui.MessageBox(0, LoadString(IDS_SETTING2), "Hello", win32con.MB_OK)
+
+
+def onSetting3(items, bindctx):
+    win32gui.MessageBox(0, LoadString(IDS_SETTING3), "Hello", win32con.MB_OK)
+
+
+taskSettings = [
+    Command(
+        GUID_Setting1, IDS_SETTING1, IDS_SETTING1_TT, IDI_SETTINGS, 0, onSetting1, None
+    ),
+    Command(
+        GUID_Setting2, IDS_SETTING2, IDS_SETTING2_TT, IDI_SETTINGS, 0, onSetting2, None
+    ),
+    Command(
+        GUID_Setting3, IDS_SETTING3, IDS_SETTING3_TT, IDI_SETTINGS, 0, onSetting3, None
+    ),
+]
+
+tasks = [
+    Command(GUID_Display, IDS_DISPLAY, IDS_DISPLAY_TT, IDI_ICON1, 0, onDisplay, None),
+    Command(
+        GUID_Settings,
+        IDS_SETTINGS,
+        IDS_SETTINGS_TT,
+        IDI_SETTINGS,
+        shellcon.ECF_HASSUBCOMMANDS,
+        None,
+        taskSettings,
+    ),
+]
+
+
+class ExplorerCommandProvider:
+    _com_interfaces_ = [shell.IID_IExplorerCommandProvider]
+    _public_methods_ = shellcon.IExplorerCommandProvider_Methods
+
+    def GetCommands(self, site, iid):
+        items = [wrap(ExplorerCommand(t)) for t in tasks]
+        return NewEnum(items, shell.IID_IEnumExplorerCommand)
+
+
+class ExplorerCommand:
+    _com_interfaces_ = [shell.IID_IExplorerCommand]
+    _public_methods_ = shellcon.IExplorerCommand_Methods
+
+    def __init__(self, cmd):
+        self.cmd = cmd
+
+    # The sample also appears to ignore the pidl args!?
+    def GetTitle(self, pidl):
+        return LoadString(self.cmd.ids)
+
+    def GetToolTip(self, pidl):
+        return LoadString(self.cmd.ids_tt)
+
+    def GetIcon(self, pidl):
+        # Return a string of the usual "dll,resource_id" format
+        # todo - just return any ".ico that comes with python" + ",0" :)
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def GetState(self, shell_items, slow_ok):
+        return shellcon.ECS_ENABLED
+
+    def GetFlags(self):
+        return self.cmd.flags
+
+    def GetCanonicalName(self):
+        return self.cmd.guid
+
+    def Invoke(self, items, bind_ctx):
+        # If no function defined - just return S_OK
+        if self.cmd.callback:
+            self.cmd.callback(items, bind_ctx)
+        else:
+            print("No callback for command ", LoadString(self.cmd.ids))
+
+    def EnumSubCommands(self):
+        if not self.cmd.children:
+            return None
+        items = [wrap(ExplorerCommand(c)) for c in self.cmd.children]
+        return NewEnum(items, shell.IID_IEnumExplorerCommand)
+
+
+# end of sample's FVCommands.cpp port
+
+
+# start of sample's Category.cpp port
+class FolderViewCategorizer:
+    _com_interfaces_ = [shell.IID_ICategorizer]
+    _public_methods_ = shellcon.ICategorizer_Methods
+
+    description = None  # subclasses should set their own
+
+    def __init__(self, shell_folder):
+        self.sf = shell_folder
+
+    #  Determines the relative order of two items in their item identifier lists.
+    def CompareCategory(self, flags, cat1, cat2):
+        return cat1 - cat2
+
+    #  Retrieves the name of a categorizer, such as "Group By Device
+    #  Type", that can be displayed in the user interface.
+    def GetDescription(self, cch):
+        return self.description
+
+    # Retrieves information about a category, such as the default
+    # display and the text to display in the user interface.
+    def GetCategoryInfo(self, catid):
+        # Note: this isn't always appropriate!  See overrides below
+        return 0, str(catid)  # ????
+
+
+class FolderViewCategorizer_Name(FolderViewCategorizer):
+    description = "Alphabetical"
+
+    def GetCategory(self, pidls):
+        ret = []
+        for pidl in pidls:
+            val = self.sf.GetDetailsEx(pidl, PKEY_ItemNameDisplay)
+            ret.append(val)
+        return ret
+
+
+class FolderViewCategorizer_Size(FolderViewCategorizer):
+    description = "Group By Size"
+
+    def GetCategory(self, pidls):
+        ret = []
+        for pidl in pidls:
+            # Why don't we just get the size of the PIDL?
+            val = self.sf.GetDetailsEx(pidl, PKEY_Sample_AreaSize)
+            val = int(val)  # it probably came in a VT_BSTR variant
+            if val < 255 // 3:
+                cid = IDS_SMALL
+            elif val < 2 * 255 // 3:
+                cid = IDS_MEDIUM
+            else:
+                cid = IDS_LARGE
+            ret.append(cid)
+        return ret
+
+    def GetCategoryInfo(self, catid):
+        return 0, LoadString(catid)
+
+
+class FolderViewCategorizer_Sides(FolderViewCategorizer):
+    description = "Group By Sides"
+
+    def GetCategory(self, pidls):
+        ret = []
+        for pidl in pidls:
+            val = self.sf.GetDetailsEx(pidl, PKEY_ItemNameDisplay)
+            if val == 0:
+                cid = IDS_CIRCLE
+            elif val == 3:
+                cid = IDS_TRIANGLE
+            elif val == 4:
+                cid = IDS_RECTANGLE
+            elif val == 5:
+                cid = IDS_POLYGON
+            else:
+                cid = IDS_UNSPECIFIED
+            ret.append(cid)
+        return ret
+
+    def GetCategoryInfo(self, catid):
+        return 0, LoadString(catid)
+
+
+class FolderViewCategorizer_Value(FolderViewCategorizer):
+    description = "Group By Value"
+
+    def GetCategory(self, pidls):
+        ret = []
+        for pidl in pidls:
+            val = self.sf.GetDetailsEx(pidl, PKEY_ItemNameDisplay)
+            if val in "one two three four".split():
+                ret.append(IDS_LESSTHAN5)
+            else:
+                ret.append(IDS_5ORGREATER)
+        return ret
+
+    def GetCategoryInfo(self, catid):
+        return 0, LoadString(catid)
+
+
+class FolderViewCategorizer_Level(FolderViewCategorizer):
+    description = "Group By Value"
+
+    def GetCategory(self, pidls):
+        return [
+            self.sf.GetDetailsEx(pidl, PKEY_Sample_DirectoryLevel) for pidl in pidls
+        ]
+
+
+class ViewCategoryProvider:
+    _com_interfaces_ = [shell.IID_ICategoryProvider]
+    _public_methods_ = shellcon.ICategoryProvider_Methods
+
+    def __init__(self, shell_folder):
+        self.shell_folder = shell_folder
+
+    def CanCategorizeOnSCID(self, pkey):
+        return pkey in [
+            PKEY_ItemNameDisplay,
+            PKEY_Sample_AreaSize,
+            PKEY_Sample_NumberOfSides,
+            PKEY_Sample_DirectoryLevel,
+        ]
+
+    #  Creates a category object.
+    def CreateCategory(self, guid, iid):
+        if iid == shell.IID_ICategorizer:
+            if guid == CAT_GUID_NAME:
+                klass = FolderViewCategorizer_Name
+            elif guid == CAT_GUID_SIDES:
+                klass = FolderViewCategorizer_Sides
+            elif guid == CAT_GUID_SIZE:
+                klass = FolderViewCategorizer_Size
+            elif guid == CAT_GUID_VALUE:
+                klass = FolderViewCategorizer_Value
+            elif guid == CAT_GUID_LEVEL:
+                klass = FolderViewCategorizer_Level
+            else:
+                raise COMException(hresult=winerror.E_INVALIDARG)
+            return wrap(klass(self.shell_folder))
+        raise COMException(hresult=winerror.E_NOINTERFACE)
+
+    #  Retrieves the enumerator for the categories.
+    def EnumCategories(self):
+        # These are additional categories beyond the columns
+        seq = [CAT_GUID_VALUE]
+        return NewEnum(seq, pythoncom.IID_IEnumGUID)
+
+    #  Retrieves a globally unique identifier (GUID) that represents
+    #  the categorizer to use for the specified Shell column.
+    def GetCategoryForSCID(self, scid):
+        if scid == PKEY_ItemNameDisplay:
+            guid = CAT_GUID_NAME
+        elif scid == PKEY_Sample_AreaSize:
+            guid = CAT_GUID_SIZE
+        elif scid == PKEY_Sample_NumberOfSides:
+            guid = CAT_GUID_SIDES
+        elif scid == PKEY_Sample_DirectoryLevel:
+            guid = CAT_GUID_LEVEL
+        elif scid == pythoncom.IID_NULL:
+            # This can be called with a NULL
+            # format ID. This will happen if you have a category,
+            # not based on a column, that gets stored in the
+            # property bag. When a return is made to this item,
+            # it will call this function with a NULL format id.
+            guid = CAT_GUID_VALUE
+        else:
+            raise COMException(hresult=winerror.E_INVALIDARG)
+        return guid
+
+    #  Retrieves the name of the specified category. This is where
+    #  additional categories that appear under the column
+    #  related categories in the UI, get their display names.
+    def GetCategoryName(self, guid, cch):
+        if guid == CAT_GUID_VALUE:
+            return "Value"
+        raise COMException(hresult=winerror.E_FAIL)
+
+    #  Enables the folder to override the default grouping.
+    def GetDefaultCategory(self):
+        return CAT_GUID_LEVEL, (pythoncom.IID_NULL, 0)
+
+
+# end of sample's Category.cpp port
+
+# start of sample's ContextMenu.cpp port
+MENUVERB_DISPLAY = 0
+
+folderViewImplContextMenuIDs = [
+    (
+        "display",
+        MENUVERB_DISPLAY,
+        0,
+    ),
+]
+
+
+class ContextMenu:
+    _reg_progid_ = "Python.ShellFolderSample.ContextMenu"
+    _reg_desc_ = "Python FolderView Context Menu"
+    _reg_clsid_ = "{fed40039-021f-4011-87c5-6188b9979764}"
+    _com_interfaces_ = [
+        shell.IID_IShellExtInit,
+        shell.IID_IContextMenu,
+        axcontrol.IID_IObjectWithSite,
+    ]
+    _public_methods_ = (
+        shellcon.IContextMenu_Methods
+        + shellcon.IShellExtInit_Methods
+        + ["GetSite", "SetSite"]
+    )
+    _context_menu_type_ = "PythonFolderViewSampleType"
+
+    def __init__(self):
+        self.site = None
+        self.dataobj = None
+
+    def Initialize(self, folder, dataobj, hkey):
+        self.dataobj = dataobj
+
+    def QueryContextMenu(self, hMenu, indexMenu, idCmdFirst, idCmdLast, uFlags):
+        s = LoadString(IDS_DISPLAY)
+        win32gui.InsertMenu(
+            hMenu, indexMenu, win32con.MF_BYPOSITION, idCmdFirst + MENUVERB_DISPLAY, s
+        )
+        indexMenu += 1
+        # other verbs could go here...
+
+        # indicate that we added one verb.
+        return 1
+
+    def InvokeCommand(self, ci):
+        mask, hwnd, verb, params, dir, nShow, hotkey, hicon = ci
+        # this seems very convoluted, but it's what the sample does :)
+        for verb_name, verb_id, flag in folderViewImplContextMenuIDs:
+            if isinstance(verb, int):
+                matches = verb == verb_id
+            else:
+                matches = verb == verb_name
+            if matches:
+                break
+        else:
+            raise AssertionError(ci, "failed to find our ID")
+        if verb_id == MENUVERB_DISPLAY:
+            sia = shell.SHCreateShellItemArrayFromDataObject(self.dataobj)
+            DisplayItem(hwnd, sia)
+        else:
+            raise AssertionError(ci, "Got some verb we weren't expecting?")
+
+    def GetCommandString(self, cmd, typ):
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def SetSite(self, site):
+        self.site = site
+
+    def GetSite(self, iid):
+        return self.site
+
+
+# end of sample's ContextMenu.cpp port
+
+
+# start of sample's ShellFolder.cpp port
+class ShellFolder:
+    _com_interfaces_ = [
+        shell.IID_IBrowserFrameOptions,
+        pythoncom.IID_IPersist,
+        shell.IID_IPersistFolder,
+        shell.IID_IPersistFolder2,
+        shell.IID_IShellFolder,
+        shell.IID_IShellFolder2,
+    ]
+
+    _public_methods_ = (
+        shellcon.IBrowserFrame_Methods
+        + shellcon.IPersistFolder2_Methods
+        + shellcon.IShellFolder2_Methods
+    )
+
+    _reg_progid_ = "Python.ShellFolderSample.Folder2"
+    _reg_desc_ = "Python FolderView sample"
+    _reg_clsid_ = "{bb8c24ad-6aaa-4cec-ac5e-c429d5f57627}"
+
+    max_levels = 5
+
+    def __init__(self, level=0):
+        self.current_level = level
+        self.pidl = None  # set when Initialize is called
+
+    def ParseDisplayName(self, hwnd, reserved, displayName, attr):
+        # print("ParseDisplayName", displayName)
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def EnumObjects(self, hwndOwner, flags):
+        if self.current_level >= self.max_levels:
+            return None
+        return make_item_enum(self.current_level + 1, flags)
+
+    def BindToObject(self, pidl, bc, iid):
+        tail = pidl_to_item(pidl)
+        # assert tail['is_folder'], "BindToObject should only be called on folders?"
+        # *sob*
+        # No point creating object just to have QI fail.
+        if iid not in ShellFolder._com_interfaces_:
+            raise COMException(hresult=winerror.E_NOTIMPL)
+        child = ShellFolder(self.current_level + 1)
+        # hrmph - not sure what multiple PIDLs here mean?
+        #        assert len(pidl)==1, pidl # expecting just relative child PIDL
+        child.Initialize(self.pidl + pidl)
+        return wrap(child, iid)
+
+    def BindToStorage(self, pidl, bc, iid):
+        return self.BindToObject(pidl, bc, iid)
+
+    def CompareIDs(self, param, id1, id2):
+        return 0  # XXX - todo - implement this!
+
+    def CreateViewObject(self, hwnd, iid):
+        if iid == shell.IID_IShellView:
+            com_folder = wrap(self)
+            return shell.SHCreateShellFolderView(com_folder)
+        elif iid == shell.IID_ICategoryProvider:
+            return wrap(ViewCategoryProvider(self))
+        elif iid == shell.IID_IContextMenu:
+            ws = wrap(self)
+            dcm = (hwnd, None, self.pidl, ws, None)
+            return shell.SHCreateDefaultContextMenu(dcm, iid)
+        elif iid == shell.IID_IExplorerCommandProvider:
+            return wrap(ExplorerCommandProvider())
+        else:
+            raise COMException(hresult=winerror.E_NOINTERFACE)
+
+    def GetAttributesOf(self, pidls, attrFlags):
+        assert len(pidls) == 1, "sample only expects 1 too!"
+        assert len(pidls[0]) == 1, "expect relative pidls!"
+        item = pidl_to_item(pidls[0])
+        flags = 0
+        if item["is_folder"]:
+            flags |= shellcon.SFGAO_FOLDER
+        if item["level"] < self.max_levels:
+            flags |= shellcon.SFGAO_HASSUBFOLDER
+        return flags
+
+    #  Retrieves an OLE interface that can be used to carry out
+    #  actions on the specified file objects or folders.
+    def GetUIObjectOf(self, hwndOwner, pidls, iid, inout):
+        assert len(pidls) == 1, "oops - aren't expecting more than one!"
+        assert len(pidls[0]) == 1, "assuming relative pidls!"
+        item = pidl_to_item(pidls[0])
+        if iid == shell.IID_IContextMenu:
+            ws = wrap(self)
+            dcm = (hwndOwner, None, self.pidl, ws, pidls)
+            return shell.SHCreateDefaultContextMenu(dcm, iid)
+        elif iid == shell.IID_IExtractIconW:
+            dxi = shell.SHCreateDefaultExtractIcon()
+            # dxi is IDefaultExtractIconInit
+            if item["is_folder"]:
+                dxi.SetNormalIcon("shell32.dll", 4)
+            else:
+                dxi.SetNormalIcon("shell32.dll", 1)
+            # just return the dxi - let Python QI for IID_IExtractIconW
+            return dxi
+
+        elif iid == pythoncom.IID_IDataObject:
+            return shell.SHCreateDataObject(self.pidl, pidls, None, iid)
+
+        elif iid == shell.IID_IQueryAssociations:
+            elts = []
+            if item["is_folder"]:
+                elts.append((shellcon.ASSOCCLASS_FOLDER, None, None))
+            elts.append(
+                (shellcon.ASSOCCLASS_PROGID_STR, None, ContextMenu._context_menu_type_)
+            )
+            return shell.AssocCreateForClasses(elts, iid)
+
+        raise COMException(hresult=winerror.E_NOINTERFACE)
+
+    #  Retrieves the display name for the specified file object or subfolder.
+    def GetDisplayNameOf(self, pidl, flags):
+        item = pidl_to_item(pidl)
+        if flags & shellcon.SHGDN_FORPARSING:
+            if flags & shellcon.SHGDN_INFOLDER:
+                return item["name"]
+            else:
+                if flags & shellcon.SHGDN_FORADDRESSBAR:
+                    sigdn = shellcon.SIGDN_DESKTOPABSOLUTEEDITING
+                else:
+                    sigdn = shellcon.SIGDN_DESKTOPABSOLUTEPARSING
+                parent = shell.SHGetNameFromIDList(self.pidl, sigdn)
+                return parent + "\\" + item["name"]
+        else:
+            return item["name"]
+
+    def SetNameOf(self, hwndOwner, pidl, new_name, flags):
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def GetClassID(self):
+        return self._reg_clsid_
+
+    #  IPersistFolder method
+    def Initialize(self, pidl):
+        self.pidl = pidl
+
+    #  IShellFolder2 methods
+    def EnumSearches(self):
+        raise COMException(hresult=winerror.E_NOINTERFACE)
+
+    #  Retrieves the default sorting and display columns.
+    def GetDefaultColumn(self, dwres):
+        # result is (sort, display)
+        return 0, 0
+
+    #  Retrieves the default state for a specified column.
+    def GetDefaultColumnState(self, iCol):
+        if iCol < 3:
+            return shellcon.SHCOLSTATE_ONBYDEFAULT | shellcon.SHCOLSTATE_TYPE_STR
+        raise COMException(hresult=winerror.E_INVALIDARG)
+
+    #  Requests the GUID of the default search object for the folder.
+    def GetDefaultSearchGUID(self):
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    #  Helper function for getting the display name for a column.
+    def _GetColumnDisplayName(self, pidl, pkey):
+        item = pidl_to_item(pidl)
+        is_folder = item["is_folder"]
+        if pkey == PKEY_ItemNameDisplay:
+            val = item["name"]
+        elif pkey == PKEY_Sample_AreaSize and not is_folder:
+            val = "%d Sq. Ft." % item["size"]
+        elif pkey == PKEY_Sample_NumberOfSides and not is_folder:
+            val = str(item["sides"])  # not sure why str()
+        elif pkey == PKEY_Sample_DirectoryLevel:
+            val = str(item["level"])
+        else:
+            val = ""
+        return val
+
+    #  Retrieves detailed information, identified by a
+    #  property set ID (FMTID) and property ID (PID),
+    #  on an item in a Shell folder.
+    def GetDetailsEx(self, pidl, pkey):
+        item = pidl_to_item(pidl)
+        is_folder = item["is_folder"]
+        if not is_folder and pkey == PKEY_PropList_PreviewDetails:
+            return "prop:Sample.AreaSize;Sample.NumberOfSides;Sample.DirectoryLevel"
+        return self._GetColumnDisplayName(pidl, pkey)
+
+    #  Retrieves detailed information, identified by a
+    #  column index, on an item in a Shell folder.
+    def GetDetailsOf(self, pidl, iCol):
+        key = self.MapColumnToSCID(iCol)
+        if pidl is None:
+            data = [
+                (commctrl.LVCFMT_LEFT, "Name"),
+                (commctrl.LVCFMT_CENTER, "Size"),
+                (commctrl.LVCFMT_CENTER, "Sides"),
+                (commctrl.LVCFMT_CENTER, "Level"),
+            ]
+            if iCol >= len(data):
+                raise COMException(hresult=winerror.E_FAIL)
+            fmt, val = data[iCol]
+        else:
+            fmt = 0  # ?
+            val = self._GetColumnDisplayName(pidl, key)
+        cxChar = 24
+        return fmt, cxChar, val
+
+    #  Converts a column name to the appropriate
+    #  property set ID (FMTID) and property ID (PID).
+    def MapColumnToSCID(self, iCol):
+        data = [
+            PKEY_ItemNameDisplay,
+            PKEY_Sample_AreaSize,
+            PKEY_Sample_NumberOfSides,
+            PKEY_Sample_DirectoryLevel,
+        ]
+        if iCol >= len(data):
+            raise COMException(hresult=winerror.E_FAIL)
+        return data[iCol]
+
+    #  IPersistFolder2 methods
+    #  Retrieves the PIDLIST_ABSOLUTE for the folder object.
+    def GetCurFolder(self):
+        # The docs say this is OK, but I suspect it's a problem in this case :)
+        # assert self.pidl, "haven't been initialized?"
+        return self.pidl
+
+
+# end of sample's ShellFolder.cpp port
+
+
+def get_schema_fname():
+    me = win32api.GetFullPathName(__file__)
+    sc = os.path.splitext(me)[0] + ".propdesc"
+    assert os.path.isfile(sc), sc
+    return sc
+
+
+def DllRegisterServer():
+    import winreg
+
+    if sys.getwindowsversion()[0] < 6:
+        print("This sample only works on Vista")
+        sys.exit(1)
+
+    key = winreg.CreateKey(
+        winreg.HKEY_LOCAL_MACHINE,
+        "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\"
+        "Explorer\\Desktop\\Namespace\\" + ShellFolder._reg_clsid_,
+    )
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, ShellFolder._reg_desc_)
+    # And special shell keys under our CLSID
+    key = winreg.CreateKey(
+        winreg.HKEY_CLASSES_ROOT, "CLSID\\" + ShellFolder._reg_clsid_ + "\\ShellFolder"
+    )
+    # 'Attributes' is an int stored as a binary! use struct
+    attr = (
+        shellcon.SFGAO_FOLDER | shellcon.SFGAO_HASSUBFOLDER | shellcon.SFGAO_BROWSABLE
+    )
+    import struct
+
+    s = struct.pack("i", attr)
+    winreg.SetValueEx(key, "Attributes", 0, winreg.REG_BINARY, s)
+    # register the context menu handler under the FolderViewSampleType type.
+    keypath = "{}\\shellex\\ContextMenuHandlers\\{}".format(
+        ContextMenu._context_menu_type_,
+        ContextMenu._reg_desc_,
+    )
+    key = winreg.CreateKey(winreg.HKEY_CLASSES_ROOT, keypath)
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, ContextMenu._reg_clsid_)
+    propsys.PSRegisterPropertySchema(get_schema_fname())
+    print(ShellFolder._reg_desc_, "registration complete.")
+
+
+def DllUnregisterServer():
+    import winreg
+
+    paths = [
+        "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Desktop\\Namespace\\"
+        + ShellFolder._reg_clsid_,
+        "{}\\shellex\\ContextMenuHandlers\\{}".format(
+            ContextMenu._context_menu_type_, ContextMenu._reg_desc_
+        ),
+    ]
+    for path in paths:
+        try:
+            winreg.DeleteKey(winreg.HKEY_LOCAL_MACHINE, path)
+        except OSError as details:
+            import errno
+
+            if details.errno != errno.ENOENT:
+                print(f"FAILED to remove {path}: {details}")
+
+    propsys.PSUnregisterPropertySchema(get_schema_fname())
+    print(ShellFolder._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        ShellFolder,
+        ContextMenu,
+        debug=debug,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/icon_handler.py

@@ -0,0 +1,81 @@
+# A sample icon handler.  Sets the icon for Python files to a random
+# ICO file.  ICO files are found in the Python directory - generally there will
+# be 3 icons found.
+#
+# To demostrate:
+# * Execute this script to register the context menu.
+# * Open Windows Explorer, and browse to a directory with a .py file.
+# * Note the pretty, random selection of icons!
+# Use glob to locate ico files, and random.choice to pick one.
+import glob
+import os
+import random
+import sys
+
+import pythoncom
+import winerror
+from win32com.shell import shell
+
+ico_files = glob.glob(os.path.join(sys.prefix, "*.ico"))
+if not ico_files:
+    ico_files = glob.glob(os.path.join(sys.prefix, "PC", "*.ico"))
+if not ico_files:
+    print("WARNING: Can't find any icon files")
+
+# Our shell extension.
+IExtractIcon_Methods = "Extract GetIconLocation".split()
+IPersistFile_Methods = "IsDirty Load Save SaveCompleted GetCurFile".split()
+
+
+class ShellExtension:
+    _reg_progid_ = "Python.ShellExtension.IconHandler"
+    _reg_desc_ = "Python Sample Shell Extension (icon handler)"
+    _reg_clsid_ = "{a97e32d7-3b78-448c-b341-418120ea9227}"
+    _com_interfaces_ = [shell.IID_IExtractIcon, pythoncom.IID_IPersistFile]
+    _public_methods_ = IExtractIcon_Methods + IPersistFile_Methods
+
+    def Load(self, filename, mode):
+        self.filename = filename
+        self.mode = mode
+
+    def GetIconLocation(self, flags):
+        # note - returning a single int will set the HRESULT (eg, S_FALSE,
+        # E_PENDING - see MS docs for details.
+        return random.choice(ico_files), 0, 0
+
+    def Extract(self, fname, index, size):
+        return winerror.S_FALSE
+
+
+def DllRegisterServer():
+    import winreg
+
+    key = winreg.CreateKey(winreg.HKEY_CLASSES_ROOT, "Python.File\\shellex")
+    subkey = winreg.CreateKey(key, "IconHandler")
+    winreg.SetValueEx(subkey, None, 0, winreg.REG_SZ, ShellExtension._reg_clsid_)
+    print(ShellExtension._reg_desc_, "registration complete.")
+
+
+def DllUnregisterServer():
+    import winreg
+
+    try:
+        key = winreg.DeleteKey(
+            winreg.HKEY_CLASSES_ROOT, "Python.File\\shellex\\IconHandler"
+        )
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    print(ShellExtension._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        ShellExtension,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )

Utils/PythonNew32/Lib/site-packages/win32comext/shell/demos/servers/shell_view.py

@@ -0,0 +1,971 @@
+# A sample shell namespace view
+
+# To demostrate:
+# * Execute this script to register the namespace.
+# * Open Windows Explorer, and locate the new "Python Path Shell Browser"
+#   folder off "My Computer"
+# * Browse this tree - .py files are shown expandable, with classes and
+#   methods selectable.  Selecting a Python file, or a class/method, will
+#   display the file using Scintilla.
+# Known problems:
+# * Classes and methods don't have icons - this is a demo, so we keep it small
+#   See icon_handler.py for examples of how to work with icons.
+#
+#
+# Notes on PIDLs
+# PIDLS are complicated, but fairly well documented in MSDN.  If you need to
+# do much with these shell extensions, you must understand their concept.
+# Here is a short-course, as it applies to this sample:
+# A PIDL identifies an item, much in the same way that a filename does
+# (however, the shell is not limited to displaying "files").
+# An "ItemID" is a single string, each being an item in the hierarchy.
+# A "PIDL" is a list of these strings.
+# All shell etc functions work with PIDLs, so even in the case where
+# an ItemID is conceptually used, a 1-item list is always used.
+# Conceptually, think of:
+#    pidl = pathname.split("\\") # pidl is a list of "parent" items.
+#    # each item is a string 'item id', but these are ever used directly
+# As there is no concept of passing a single item, to open a file using only
+# a relative filename, conceptually you would say:
+#   open_file([filename]) # Pass a single-itemed relative "PIDL"
+# and continuing the analogy, a "listdir" type function would return a list
+# of single-itemed lists - each list containing the relative PIDL of the child.
+#
+# Each PIDL entry is a binary string, and may contain any character.  For
+# PIDLs not created by you, they can not be interpreted - they are just
+# blobs.  PIDLs created by you (ie, children of your IShellFolder) can
+# store and interpret the string however makes most sense for your application.
+# (but within PIDL rules - they must be persistable, etc)
+# There is no reason that pickled strings, for example, couldn't be used
+# as an EntryID.
+# This application takes a simple approach - each PIDL is a string of form
+# "directory\0directory_name", "file\0file_name" or
+# "object\0file_name\0class_name[.method_name"
+# The first string in each example is literal (ie, the word 'directory',
+# 'file' or 'object', and every other string is variable.  We use '\0' as
+# a field sep just 'cos we can (and 'cos it can't possibly conflict with the
+# string content)
+
+import os
+import pyclbr
+import sys
+
+import commctrl
+import pythoncom
+import win32api
+import win32con
+import win32gui
+import win32gui_struct
+import winerror
+from pywin.scintilla import scintillacon
+from win32com.server.exception import COMException
+from win32com.server.util import NewEnum, wrap
+from win32com.shell import shell, shellcon
+from win32com.util import IIDToInterfaceName
+
+# Set this to 1 to cause debug version to be registered and used.  A debug
+# version will spew output to win32traceutil.
+debug = 0
+if debug:
+    import win32traceutil
+
+# markh is toying with an implementation that allows auto reload of a module
+# if this attribute exists.
+com_auto_reload = True
+
+
+# Helper function to get a system IShellFolder interface, and the PIDL within
+# that folder for an existing file/directory.
+def GetFolderAndPIDLForPath(filename):
+    desktop = shell.SHGetDesktopFolder()
+    info = desktop.ParseDisplayName(0, None, os.path.abspath(filename))
+    cchEaten, pidl, attr = info
+    # We must walk the ID list, looking for one child at a time.
+    folder = desktop
+    while len(pidl) > 1:
+        this = pidl.pop(0)
+        folder = folder.BindToObject([this], None, shell.IID_IShellFolder)
+    # We are left with the pidl for the specific item.  Leave it as
+    # a list, so it remains a valid PIDL.
+    return folder, pidl
+
+
+# A cache of pyclbr module objects, so we only parse a given filename once.
+clbr_modules = {}  # Indexed by path, item is dict as returned from pyclbr
+
+
+def get_clbr_for_file(path):
+    try:
+        objects = clbr_modules[path]
+    except KeyError:
+        dir, filename = os.path.split(path)
+        base, ext = os.path.splitext(filename)
+        objects = pyclbr.readmodule_ex(base, [dir])
+        clbr_modules[path] = objects
+    return objects
+
+
+# Our COM interfaces.
+
+
+# Base class for a shell folder.
+# All child classes use a simple PIDL of the form:
+#  "object_type\0object_name[\0extra ...]"
+class ShellFolderBase:
+    _com_interfaces_ = [
+        shell.IID_IBrowserFrameOptions,
+        pythoncom.IID_IPersist,
+        shell.IID_IPersistFolder,
+        shell.IID_IShellFolder,
+    ]
+
+    _public_methods_ = (
+        shellcon.IBrowserFrame_Methods
+        + shellcon.IPersistFolder_Methods
+        + shellcon.IShellFolder_Methods
+    )
+
+    def GetFrameOptions(self, mask):
+        # print("GetFrameOptions", self, mask)
+        return 0
+
+    def ParseDisplayName(self, hwnd, reserved, displayName, attr):
+        print("ParseDisplayName", displayName)
+        # return cchEaten, pidl, attr
+
+    def BindToStorage(self, pidl, bc, iid):
+        print("BTS", iid, IIDToInterfaceName(iid))
+
+    def BindToObject(self, pidl, bc, iid):
+        # We may be passed a set of relative PIDLs here - ie
+        # [pidl_of_dir, pidl_of_child_dir, pidl_of_file, pidl_of_function]
+        # But each of our PIDLs keeps the fully qualified name anyway - so
+        # just jump directly to the last.
+        final_pidl = pidl[-1]
+        typ, extra = final_pidl.split("\0", 1)
+        if typ == "directory":
+            klass = ShellFolderDirectory
+        elif typ == "file":
+            klass = ShellFolderFile
+        elif typ == "object":
+            klass = ShellFolderObject
+        else:
+            raise RuntimeError(f"What is {typ!r}")
+        ret = wrap(klass(extra), iid, useDispatcher=(debug > 0))
+        return ret
+
+
+# A ShellFolder for an object with CHILDREN on the file system
+# Note that this means our "File" folder is *not* a 'FileSystem' folder,
+# as it's children (functions and classes) are not on the file system.
+#
+class ShellFolderFileSystem(ShellFolderBase):
+    def _GetFolderAndPIDLForPIDL(self, my_idl):
+        typ, name = my_idl[0].split("\0")
+        return GetFolderAndPIDLForPath(name)
+
+    # Interface methods
+    def CompareIDs(self, param, id1, id2):
+        if id1 < id2:
+            return -1
+        if id1 == id2:
+            return 0
+        return 1
+
+    def GetUIObjectOf(self, hwndOwner, pidls, iid, inout):
+        # delegate to the shell.
+        assert len(pidls) == 1, "oops - aren't expecting more than one!"
+        pidl = pidls[0]
+        folder, child_pidl = self._GetFolderAndPIDLForPIDL(pidl)
+        try:
+            inout, ret = folder.GetUIObjectOf(hwndOwner, [child_pidl], iid, inout, iid)
+        except pythoncom.com_error as exc:
+            raise COMException(hresult=exc.hresult)
+        return inout, ret
+        # return object of IID
+
+    def GetDisplayNameOf(self, pidl, flags):
+        # delegate to the shell.
+        folder, child_pidl = self._GetFolderAndPIDLForPIDL(pidl)
+        ret = folder.GetDisplayNameOf(child_pidl, flags)
+        return ret
+
+    def GetAttributesOf(self, pidls, attrFlags):
+        ret_flags = -1
+        for pidl in pidls:
+            pidl = pidl[0]  # ??
+            typ, name = pidl.split("\0")
+            flags = shellcon.SHGFI_ATTRIBUTES
+            rc, info = shell.SHGetFileInfo(name, 0, flags)
+            hIcon, iIcon, dwAttr, name, typeName = info
+            # All our items, even files, have sub-items
+            extras = (
+                shellcon.SFGAO_HASSUBFOLDER
+                | shellcon.SFGAO_FOLDER
+                | shellcon.SFGAO_FILESYSANCESTOR
+                | shellcon.SFGAO_BROWSABLE
+            )
+            ret_flags &= dwAttr | extras
+        return ret_flags
+
+
+class ShellFolderDirectory(ShellFolderFileSystem):
+    def __init__(self, path):
+        self.path = os.path.abspath(path)
+
+    def CreateViewObject(self, hwnd, iid):
+        # delegate to the shell.
+        folder, child_pidl = GetFolderAndPIDLForPath(self.path)
+        return folder.CreateViewObject(hwnd, iid)
+
+    def EnumObjects(self, hwndOwner, flags):
+        pidls = []
+        for fname in os.listdir(self.path):
+            fqn = os.path.join(self.path, fname)
+            if os.path.isdir(fqn):
+                type_name = "directory"
+                type_class = ShellFolderDirectory
+            else:
+                base, ext = os.path.splitext(fname)
+                if ext in [".py", ".pyw"]:
+                    type_class = ShellFolderFile
+                    type_name = "file"
+                else:
+                    type_class = None
+            if type_class is not None:
+                pidls.append([type_name + "\0" + fqn])
+        return NewEnum(pidls, iid=shell.IID_IEnumIDList, useDispatcher=(debug > 0))
+
+    def GetDisplayNameOf(self, pidl, flags):
+        final_pidl = pidl[-1]
+        full_fname = final_pidl.split("\0")[-1]
+        return os.path.split(full_fname)[-1]
+
+    def GetAttributesOf(self, pidls, attrFlags):
+        return (
+            shellcon.SFGAO_HASSUBFOLDER
+            | shellcon.SFGAO_FOLDER
+            | shellcon.SFGAO_FILESYSANCESTOR
+            | shellcon.SFGAO_BROWSABLE
+        )
+
+
+# As per comments above, even though this manages a file, it is *not* a
+# ShellFolderFileSystem, as the children are not on the file system.
+class ShellFolderFile(ShellFolderBase):
+    def __init__(self, path):
+        self.path = os.path.abspath(path)
+
+    def EnumObjects(self, hwndOwner, flags):
+        objects = get_clbr_for_file(self.path)
+        pidls = []
+        for name in objects:
+            pidls.append(["object\0" + self.path + "\0" + name])
+        return NewEnum(pidls, iid=shell.IID_IEnumIDList, useDispatcher=(debug > 0))
+
+    def GetAttributesOf(self, pidls, attrFlags):
+        ret_flags = -1
+        for pidl in pidls:
+            assert len(pidl) == 1, "Expecting relative pidls"
+            pidl = pidl[0]
+            typ, filename, obname = pidl.split("\0")
+            obs = get_clbr_for_file(filename)
+            ob = obs[obname]
+            flags = (
+                shellcon.SFGAO_BROWSABLE
+                | shellcon.SFGAO_FOLDER
+                | shellcon.SFGAO_FILESYSANCESTOR
+            )
+            if hasattr(ob, "methods"):
+                flags |= shellcon.SFGAO_HASSUBFOLDER
+            ret_flags &= flags
+        return ret_flags
+
+    def GetDisplayNameOf(self, pidl, flags):
+        assert len(pidl) == 1, "Expecting relative PIDL"
+        typ, fname, obname = pidl[0].split("\0")
+        fqname = os.path.splitext(fname)[0] + "." + obname
+        if flags & shellcon.SHGDN_INFOLDER:
+            ret = obname
+        else:  # SHGDN_NORMAL is the default
+            ret = fqname
+        # No need to look at the SHGDN_FOR* modifiers.
+        return ret
+
+    def CreateViewObject(self, hwnd, iid):
+        return wrap(ScintillaShellView(hwnd, self.path), iid, useDispatcher=debug > 0)
+
+
+# A ShellFolder for our Python objects
+class ShellFolderObject(ShellFolderBase):
+    def __init__(self, details):
+        self.path, details = details.split("\0")
+        if details.find(".") > 0:
+            self.class_name, self.method_name = details.split(".")
+        else:
+            self.class_name = details
+            self.method_name = None
+
+    def CreateViewObject(self, hwnd, iid):
+        mod_objects = get_clbr_for_file(self.path)
+        object = mod_objects[self.class_name]
+        if self.method_name is None:
+            lineno = object.lineno
+        else:
+            lineno = object.methods[self.method_name]
+            return wrap(
+                ScintillaShellView(hwnd, self.path, lineno),
+                iid,
+                useDispatcher=debug > 0,
+            )
+
+    def EnumObjects(self, hwndOwner, flags):
+        assert self.method_name is None, "Should not be enuming methods!"
+        mod_objects = get_clbr_for_file(self.path)
+        my_objects = mod_objects[self.class_name]
+        pidls = []
+        for func_name in my_objects.methods:
+            pidl = ["object\0" + self.path + "\0" + self.class_name + "." + func_name]
+            pidls.append(pidl)
+        return NewEnum(pidls, iid=shell.IID_IEnumIDList, useDispatcher=(debug > 0))
+
+    def GetDisplayNameOf(self, pidl, flags):
+        assert len(pidl) == 1, "Expecting relative PIDL"
+        typ, fname, obname = pidl[0].split("\0")
+        class_name, method_name = obname.split(".")
+        fqname = os.path.splitext(fname)[0] + "." + obname
+        if flags & shellcon.SHGDN_INFOLDER:
+            ret = method_name
+        else:  # SHGDN_NORMAL is the default
+            ret = fqname
+        # No need to look at the SHGDN_FOR* modifiers.
+        return ret
+
+    def GetAttributesOf(self, pidls, attrFlags):
+        ret_flags = -1
+        for pidl in pidls:
+            assert len(pidl) == 1, "Expecting relative pidls"
+            flags = (
+                shellcon.SFGAO_BROWSABLE
+                | shellcon.SFGAO_FOLDER
+                | shellcon.SFGAO_FILESYSANCESTOR
+            )
+            ret_flags &= flags
+        return ret_flags
+
+
+# The "Root" folder of our namespace.  As all children are directories,
+# it is derived from ShellFolderFileSystem
+# This is the only COM object actually registered and externally created.
+class ShellFolderRoot(ShellFolderFileSystem):
+    _reg_progid_ = "Python.ShellExtension.Folder"
+    _reg_desc_ = "Python Path Shell Browser"
+    _reg_clsid_ = "{f6287035-3074-4cb5-a8a6-d3c80e206944}"
+
+    def GetClassID(self):
+        return self._reg_clsid_
+
+    def Initialize(self, pidl):
+        # This is the PIDL of us, as created by the shell.  This is our
+        # top-level ID.  All other items under us have PIDLs defined
+        # by us - see the notes at the top of the file.
+        # print("Initialize called with pidl={pidl!r}")
+        self.pidl = pidl
+
+    def CreateViewObject(self, hwnd, iid):
+        return wrap(FileSystemView(self, hwnd), iid, useDispatcher=debug > 0)
+
+    def EnumObjects(self, hwndOwner, flags):
+        items = [["directory\0" + p] for p in sys.path if os.path.isdir(p)]
+        return NewEnum(items, iid=shell.IID_IEnumIDList, useDispatcher=(debug > 0))
+
+    def GetDisplayNameOf(self, pidl, flags):
+        ## return full path for sys.path dirs, since they don't appear under a parent folder
+        final_pidl = pidl[-1]
+        display_name = final_pidl.split("\0")[-1]
+        return display_name
+
+
+# Simple shell view implementations
+
+
+# Uses a builtin listview control to display simple lists of directories
+# or filenames.
+class FileSystemView:
+    _public_methods_ = shellcon.IShellView_Methods
+    _com_interfaces_ = [
+        pythoncom.IID_IOleWindow,
+        shell.IID_IShellView,
+    ]
+
+    def __init__(self, folder, hwnd):
+        self.hwnd_parent = hwnd  # provided by explorer.
+        self.hwnd = None  # intermediate window for catching command notifications.
+        self.hwnd_child = None  # our ListView
+        self.activate_state = None
+        self.hmenu = None
+        self.browser = None
+        self.folder = folder
+        self.children = None
+
+    # IOleWindow
+    def GetWindow(self):
+        return self.hwnd
+
+    def ContextSensitiveHelp(self, enter_mode):
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    # IShellView
+    def CreateViewWindow(self, prev, settings, browser, rect):
+        print("FileSystemView.CreateViewWindow", prev, settings, browser, rect)
+        self.cur_foldersettings = settings
+        self.browser = browser
+        self._CreateMainWindow(prev, settings, browser, rect)
+        self._CreateChildWindow(prev)
+
+        # This isn't part of the sample, but the most convenient place to
+        # test/demonstrate how you can get an IShellBrowser from a HWND
+        # (but ONLY when you are in the same process as the IShellBrowser!)
+        # Obviously it is not necessary here - we already have the browser!
+        browser_ad = win32gui.SendMessage(self.hwnd_parent, win32con.WM_USER + 7, 0, 0)
+        browser_ob = pythoncom.ObjectFromAddress(browser_ad, shell.IID_IShellBrowser)
+        assert browser == browser_ob
+        # and make a call on the object to prove it doesn't die :)
+        assert browser.QueryActiveShellView() == browser_ob.QueryActiveShellView()
+
+    def _CreateMainWindow(self, prev, settings, browser, rect):
+        # Creates a parent window that hosts the view window.  This window
+        # gets the control notifications etc sent from the child.
+        style = win32con.WS_CHILD | win32con.WS_VISIBLE  #
+        wclass_name = "ShellViewDemo_DefView"
+        # Register the Window class.
+        wc = win32gui.WNDCLASS()
+        wc.hInstance = win32gui.dllhandle
+        wc.lpszClassName = wclass_name
+        wc.style = win32con.CS_VREDRAW | win32con.CS_HREDRAW
+        try:
+            win32gui.RegisterClass(wc)
+        except win32gui.error as details:
+            # Should only happen when this module is reloaded
+            if details[0] != winerror.ERROR_CLASS_ALREADY_EXISTS:
+                raise
+
+        message_map = {
+            win32con.WM_DESTROY: self.OnDestroy,
+            win32con.WM_COMMAND: self.OnCommand,
+            win32con.WM_NOTIFY: self.OnNotify,
+            win32con.WM_CONTEXTMENU: self.OnContextMenu,
+            win32con.WM_SIZE: self.OnSize,
+        }
+
+        self.hwnd = win32gui.CreateWindow(
+            wclass_name,
+            "",
+            style,
+            rect[0],
+            rect[1],
+            rect[2] - rect[0],
+            rect[3] - rect[1],
+            self.hwnd_parent,
+            0,
+            win32gui.dllhandle,
+            None,
+        )
+        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)
+        print("View 's hwnd is", self.hwnd)
+        return self.hwnd
+
+    def _CreateChildWindow(self, prev):
+        # Creates the list view window.
+        assert self.hwnd_child is None, "already have a window"
+        assert self.cur_foldersettings is not None, "no settings"
+        style = (
+            win32con.WS_CHILD
+            | win32con.WS_VISIBLE
+            | win32con.WS_BORDER
+            | commctrl.LVS_SHAREIMAGELISTS
+            | commctrl.LVS_EDITLABELS
+        )
+
+        view_mode, view_flags = self.cur_foldersettings
+        if view_mode == shellcon.FVM_ICON:
+            style |= commctrl.LVS_ICON | commctrl.LVS_AUTOARRANGE
+        elif view_mode == shellcon.FVM_SMALLICON:
+            style |= commctrl.LVS_SMALLICON | commctrl.LVS_AUTOARRANGE
+        elif view_mode == shellcon.FVM_LIST:
+            style |= commctrl.LVS_LIST | commctrl.LVS_AUTOARRANGE
+        elif view_mode == shellcon.FVM_DETAILS:
+            style |= commctrl.LVS_REPORT | commctrl.LVS_AUTOARRANGE
+        else:
+            # XP 'thumbnails' etc
+            view_mode = shellcon.FVM_DETAILS
+            # Default to 'report'
+            style |= commctrl.LVS_REPORT | commctrl.LVS_AUTOARRANGE
+
+        for f_flag, l_flag in [
+            (shellcon.FWF_SINGLESEL, commctrl.LVS_SINGLESEL),
+            (shellcon.FWF_ALIGNLEFT, commctrl.LVS_ALIGNLEFT),
+            (shellcon.FWF_SHOWSELALWAYS, commctrl.LVS_SHOWSELALWAYS),
+        ]:
+            if view_flags & f_flag:
+                style |= l_flag
+
+        self.hwnd_child = win32gui.CreateWindowEx(
+            win32con.WS_EX_CLIENTEDGE,
+            "SysListView32",
+            None,
+            style,
+            0,
+            0,
+            0,
+            0,
+            self.hwnd,
+            1000,
+            0,
+            None,
+        )
+
+        cr = win32gui.GetClientRect(self.hwnd)
+        win32gui.MoveWindow(self.hwnd_child, 0, 0, cr[2] - cr[0], cr[3] - cr[1], True)
+
+        # Setup the columns for the view.
+        lvc, extras = win32gui_struct.PackLVCOLUMN(
+            fmt=commctrl.LVCFMT_LEFT, subItem=1, text="Name", cx=300
+        )
+        win32gui.SendMessage(self.hwnd_child, commctrl.LVM_INSERTCOLUMN, 0, lvc)
+
+        lvc, extras = win32gui_struct.PackLVCOLUMN(
+            fmt=commctrl.LVCFMT_RIGHT, subItem=1, text="Exists", cx=50
+        )
+        win32gui.SendMessage(self.hwnd_child, commctrl.LVM_INSERTCOLUMN, 1, lvc)
+        # and fill it with the content
+        self.Refresh()
+
+    def GetCurrentInfo(self):
+        return self.cur_foldersettings
+
+    def UIActivate(self, activate_state):
+        print("OnActivate")
+
+    def _OnActivate(self, activate_state):
+        if self.activate_state == activate_state:
+            return
+        self._OnDeactivate()  # restore menu's first, if necessary.
+        if activate_state != shellcon.SVUIA_DEACTIVATE:
+            assert self.hmenu is None, "Should have destroyed it!"
+            self.hmenu = win32gui.CreateMenu()
+            widths = 0, 0, 0, 0, 0, 0
+            # Ask explorer to add its standard items.
+            self.browser.InsertMenusSB(self.hmenu, widths)
+            # Merge with these standard items
+            self._MergeMenus(activate_state)
+            self.browser.SetMenuSB(self.hmenu, 0, self.hwnd)
+        self.activate_state = activate_state
+
+    def _OnDeactivate(self):
+        if self.browser is not None and self.hmenu is not None:
+            self.browser.SetMenuSB(0, 0, 0)
+            self.browser.RemoveMenusSB(self.hmenu)
+            win32gui.DestroyMenu(self.hmenu)
+            self.hmenu = None
+        self.hsubmenus = None
+        self.activate_state = shellcon.SVUIA_DEACTIVATE
+
+    def _MergeMenus(self, activate_state):
+        # Merge the operations we support into the top-level menus.
+        # NOTE: This function it *not* called each time the selection changes.
+        # SVUIA_ACTIVATE_FOCUS really means "have a selection?"
+        have_sel = activate_state == shellcon.SVUIA_ACTIVATE_FOCUS
+        # only do "file" menu here, and only 1 item on it!
+        mid = shellcon.FCIDM_MENU_FILE
+        # Get the hmenu for the menu
+        buf, extras = win32gui_struct.EmptyMENUITEMINFO(win32con.MIIM_SUBMENU)
+        win32gui.GetMenuItemInfo(self.hmenu, mid, False, buf)
+        data = win32gui_struct.UnpackMENUITEMINFO(buf)
+        submenu = data[3]
+        print("Do someting with the file menu!")
+
+    def Refresh(self):
+        stateMask = commctrl.LVIS_SELECTED | commctrl.LVIS_DROPHILITED
+        state = 0
+        self.children = []
+        # Enumerate and store the child PIDLs
+        for cid in self.folder.EnumObjects(self.hwnd, 0):
+            self.children.append(cid)
+
+        for row_index, data in enumerate(self.children):
+            assert len(data) == 1, "expecting just a child PIDL"
+            typ, path = data[0].split("\0")
+            desc = os.path.exists(path) and "Yes" or "No"
+            prop_vals = (path, desc)
+            # first col
+            data, extras = win32gui_struct.PackLVITEM(
+                item=row_index,
+                subItem=0,
+                text=prop_vals[0],
+                state=state,
+                stateMask=stateMask,
+            )
+            win32gui.SendMessage(
+                self.hwnd_child, commctrl.LVM_INSERTITEM, row_index, data
+            )
+            # rest of the cols.
+            col_index = 1
+            for prop_val in prop_vals[1:]:
+                data, extras = win32gui_struct.PackLVITEM(
+                    item=row_index, subItem=col_index, text=prop_val
+                )
+
+                win32gui.SendMessage(self.hwnd_child, commctrl.LVM_SETITEM, 0, data)
+                col_index += 1
+
+    def SelectItem(self, pidl, flag):
+        # For the sake of brevity, we don't implement this yet.
+        # You would need to locate the index of the item in the shell-view
+        # with that PIDL, then ask the list-view to select it.
+        print("Please implement SelectItem for PIDL", pidl)
+
+    def GetItemObject(self, item_num, iid):
+        raise COMException(hresult=winerror.E_NOTIMPL)
+
+    def TranslateAccelerator(self, msg):
+        return winerror.S_FALSE
+
+    def DestroyViewWindow(self):
+        win32gui.DestroyWindow(self.hwnd)
+        self.hwnd = None
+        print("Destroyed view window")
+
+    # Message handlers.
+    def OnDestroy(self, hwnd, msg, wparam, lparam):
+        print("OnDestory")
+
+    def OnCommand(self, hwnd, msg, wparam, lparam):
+        print("OnCommand")
+
+    def OnNotify(self, hwnd, msg, wparam, lparam):
+        hwndFrom, idFrom, code = win32gui_struct.UnpackWMNOTIFY(lparam)
+        # print("OnNotify code=0x%x (0x%x, 0x%x)" % (code, wparam, lparam))
+        if code == commctrl.NM_SETFOCUS:
+            # Control got focus - Explorer may not know - tell it
+            if self.browser is not None:
+                self.browser.OnViewWindowActive(None)
+            # And do our menu thang
+            self._OnActivate(shellcon.SVUIA_ACTIVATE_FOCUS)
+        elif code == commctrl.NM_KILLFOCUS:
+            self._OnDeactivate()
+        elif code == commctrl.NM_DBLCLK:
+            # This DblClick implementation leaves a little to be desired :)
+            # It demonstrates some useful concepts, such as asking the
+            # folder for its context-menu and invoking a command from it.
+            # However, as our folder delegates IContextMenu to the shell
+            # itself, the end result is that the folder is opened in
+            # its "normal" place in Windows explorer rather than inside
+            # our shell-extension.
+            # Determine the selected items.
+            sel = []
+            n = -1
+            while 1:
+                n = win32gui.SendMessage(
+                    self.hwnd_child, commctrl.LVM_GETNEXTITEM, n, commctrl.LVNI_SELECTED
+                )
+                if n == -1:
+                    break
+                sel.append(self.children[n][-1:])
+            print("Selection is", sel)
+            hmenu = win32gui.CreateMenu()
+            try:
+                # Get the IContextMenu for the items.
+                inout, cm = self.folder.GetUIObjectOf(
+                    self.hwnd_parent, sel, shell.IID_IContextMenu, 0
+                )
+
+                # As per 'Q179911', we need to determine if the default operation
+                # should be 'open' or 'explore'
+                flags = shellcon.CMF_DEFAULTONLY
+                try:
+                    self.browser.GetControlWindow(shellcon.FCW_TREE)
+                    flags |= shellcon.CMF_EXPLORE
+                except pythoncom.com_error:
+                    pass
+                # *sob* - delegating to the shell does work - but lands us
+                # in the original location.  Q179911 also shows that
+                # ShellExecuteEx should work - but I can't make it work as
+                # described (XP: function call succeeds, but another thread
+                # shows a dialog with text of E_INVALID_PARAM, and new
+                # Explorer window opens with desktop view. Vista: function
+                # call succeeds, but no window created at all.
+                # On Vista, I'd love to get an IExplorerBrowser interface
+                # from the shell, but a QI fails, and although the
+                # IShellBrowser does appear to support IServiceProvider, I
+                # still can't get it
+                if 0:
+                    id_cmd_first = 1  # TrackPopupMenu makes it hard to use 0
+                    cm.QueryContextMenu(hmenu, 0, id_cmd_first, -1, flags)
+                    # Find the default item in the returned menu.
+                    cmd = win32gui.GetMenuDefaultItem(hmenu, False, 0)
+                    if cmd == -1:
+                        print("Oops: _doDefaultActionFor found no default menu")
+                    else:
+                        ci = (
+                            0,
+                            self.hwnd_parent,
+                            cmd - id_cmd_first,
+                            None,
+                            None,
+                            0,
+                            0,
+                            0,
+                        )
+                        cm.InvokeCommand(ci)
+                else:
+                    rv = shell.ShellExecuteEx(
+                        hwnd=self.hwnd_parent,
+                        nShow=win32con.SW_NORMAL,
+                        lpClass="folder",
+                        lpVerb="explore",
+                        lpIDList=sel[0],
+                    )
+                    print("ShellExecuteEx returned", rv)
+            finally:
+                win32gui.DestroyMenu(hmenu)
+
+    def OnContextMenu(self, hwnd, msg, wparam, lparam):
+        # Get the selected items.
+        pidls = []
+        n = -1
+        while 1:
+            n = win32gui.SendMessage(
+                self.hwnd_child, commctrl.LVM_GETNEXTITEM, n, commctrl.LVNI_SELECTED
+            )
+            if n == -1:
+                break
+            pidls.append(self.children[n][-1:])
+
+        spt = win32api.GetCursorPos()
+        if not pidls:
+            print("Ignoring background click")
+            return
+        # Get the IContextMenu for the items.
+        inout, cm = self.folder.GetUIObjectOf(
+            self.hwnd_parent, pidls, shell.IID_IContextMenu, 0
+        )
+        hmenu = win32gui.CreatePopupMenu()
+        sel = None
+        # As per 'Q179911', we need to determine if the default operation
+        # should be 'open' or 'explore'
+        try:
+            flags = 0
+            try:
+                self.browser.GetControlWindow(shellcon.FCW_TREE)
+                flags |= shellcon.CMF_EXPLORE
+            except pythoncom.com_error:
+                pass
+            id_cmd_first = 1  # TrackPopupMenu makes it hard to use 0
+            cm.QueryContextMenu(hmenu, 0, id_cmd_first, -1, flags)
+            tpm_flags = (
+                win32con.TPM_LEFTALIGN
+                | win32con.TPM_RETURNCMD
+                | win32con.TPM_RIGHTBUTTON
+            )
+            sel = win32gui.TrackPopupMenu(
+                hmenu, tpm_flags, spt[0], spt[1], 0, self.hwnd, None
+            )
+            print("TrackPopupMenu returned", sel)
+        finally:
+            win32gui.DestroyMenu(hmenu)
+        if sel:
+            ci = 0, self.hwnd_parent, sel - id_cmd_first, None, None, 0, 0, 0
+            cm.InvokeCommand(ci)
+
+    def OnSize(self, hwnd, msg, wparam, lparam):
+        # print("OnSize", self.hwnd_child, win32api.LOWORD(lparam), win32api.HIWORD(lparam))
+        if self.hwnd_child is not None:
+            x = win32api.LOWORD(lparam)
+            y = win32api.HIWORD(lparam)
+            win32gui.MoveWindow(self.hwnd_child, 0, 0, x, y, False)
+
+
+# This uses scintilla to display a filename, and optionally jump to a line
+# number.
+class ScintillaShellView:
+    _public_methods_ = shellcon.IShellView_Methods
+    _com_interfaces_ = [
+        pythoncom.IID_IOleWindow,
+        shell.IID_IShellView,
+    ]
+
+    def __init__(self, hwnd, filename, lineno=None):
+        self.filename = filename
+        self.lineno = lineno
+        self.hwnd_parent = hwnd
+        self.hwnd = None
+
+    def _SendSci(self, msg, wparam=0, lparam=0):
+        return win32gui.SendMessage(self.hwnd, msg, wparam, lparam)
+
+    # IShellView
+    def CreateViewWindow(self, prev, settings, browser, rect):
+        print("ScintillaShellView.CreateViewWindow", prev, settings, browser, rect)
+        # Make sure scintilla.dll is loaded.  If not, find it on sys.path
+        # (which it generally is for Pythonwin)
+        try:
+            win32api.GetModuleHandle("Scintilla.dll")
+        except win32api.error:
+            for p in sys.path:
+                fname = os.path.join(p, "Scintilla.dll")
+                if not os.path.isfile(fname):
+                    fname = os.path.join(p, "Build", "Scintilla.dll")
+                if os.path.isfile(fname):
+                    win32api.LoadLibrary(fname)
+                    break
+            else:
+                raise RuntimeError("Can't find scintilla!")
+
+        style = (
+            win32con.WS_CHILD
+            | win32con.WS_VSCROLL
+            | win32con.WS_HSCROLL
+            | win32con.WS_CLIPCHILDREN
+            | win32con.WS_VISIBLE
+        )
+        self.hwnd = win32gui.CreateWindow(
+            "Scintilla",
+            "Scintilla",
+            style,
+            rect[0],
+            rect[1],
+            rect[2] - rect[0],
+            rect[3] - rect[1],
+            self.hwnd_parent,
+            1000,
+            0,
+            None,
+        )
+
+        message_map = {
+            win32con.WM_SIZE: self.OnSize,
+        }
+        #        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)
+
+        file_data = open(self.filename, "U").read()
+
+        self._SetupLexer()
+        self._SendSci(scintillacon.SCI_ADDTEXT, len(file_data), file_data)
+        if self.lineno is not None:
+            self._SendSci(scintillacon.SCI_GOTOLINE, self.lineno)
+        print("Scintilla's hwnd is", self.hwnd)
+
+    def _SetupLexer(self):
+        h = self.hwnd
+        styles = [
+            ((0, 0, 200, 0, 0x808080), None, scintillacon.SCE_P_DEFAULT),
+            ((0, 2, 200, 0, 0x008000), None, scintillacon.SCE_P_COMMENTLINE),
+            ((0, 2, 200, 0, 0x808080), None, scintillacon.SCE_P_COMMENTBLOCK),
+            ((0, 0, 200, 0, 0x808000), None, scintillacon.SCE_P_NUMBER),
+            ((0, 0, 200, 0, 0x008080), None, scintillacon.SCE_P_STRING),
+            ((0, 0, 200, 0, 0x008080), None, scintillacon.SCE_P_CHARACTER),
+            ((0, 0, 200, 0, 0x008080), None, scintillacon.SCE_P_TRIPLE),
+            ((0, 0, 200, 0, 0x008080), None, scintillacon.SCE_P_TRIPLEDOUBLE),
+            ((0, 0, 200, 0, 0x000000), 0x008080, scintillacon.SCE_P_STRINGEOL),
+            ((0, 1, 200, 0, 0x800000), None, scintillacon.SCE_P_WORD),
+            ((0, 1, 200, 0, 0xFF0000), None, scintillacon.SCE_P_CLASSNAME),
+            ((0, 1, 200, 0, 0x808000), None, scintillacon.SCE_P_DEFNAME),
+            ((0, 0, 200, 0, 0x000000), None, scintillacon.SCE_P_OPERATOR),
+            ((0, 0, 200, 0, 0x000000), None, scintillacon.SCE_P_IDENTIFIER),
+        ]
+        self._SendSci(scintillacon.SCI_SETLEXER, scintillacon.SCLEX_PYTHON, 0)
+        self._SendSci(scintillacon.SCI_SETSTYLEBITS, 5)
+        baseFormat = (-402653169, 0, 200, 0, 0, 0, 49, "Courier New")
+        for f, bg, stylenum in styles:
+            self._SendSci(scintillacon.SCI_STYLESETFORE, stylenum, f[4])
+            self._SendSci(scintillacon.SCI_STYLESETFONT, stylenum, baseFormat[7])
+            if f[1] & 1:
+                self._SendSci(scintillacon.SCI_STYLESETBOLD, stylenum, 1)
+            else:
+                self._SendSci(scintillacon.SCI_STYLESETBOLD, stylenum, 0)
+            if f[1] & 2:
+                self._SendSci(scintillacon.SCI_STYLESETITALIC, stylenum, 1)
+            else:
+                self._SendSci(scintillacon.SCI_STYLESETITALIC, stylenum, 0)
+            self._SendSci(
+                scintillacon.SCI_STYLESETSIZE, stylenum, int(baseFormat[2] / 20)
+            )
+            if bg is not None:
+                self._SendSci(scintillacon.SCI_STYLESETBACK, stylenum, bg)
+            self._SendSci(
+                scintillacon.SCI_STYLESETEOLFILLED, stylenum, 1
+            )  # Only needed for unclosed strings.
+
+    # IOleWindow
+    def GetWindow(self):
+        return self.hwnd
+
+    def UIActivate(self, activate_state):
+        print("OnActivate")
+
+    def DestroyViewWindow(self):
+        win32gui.DestroyWindow(self.hwnd)
+        self.hwnd = None
+        print("Destroyed scintilla window")
+
+    def TranslateAccelerator(self, msg):
+        return winerror.S_FALSE
+
+    def OnSize(self, hwnd, msg, wparam, lparam):
+        x = win32api.LOWORD(lparam)
+        y = win32api.HIWORD(lparam)
+        win32gui.MoveWindow(self.hwnd, 0, 0, x, y, False)
+
+
+def DllRegisterServer():
+    import winreg
+
+    key = winreg.CreateKey(
+        winreg.HKEY_LOCAL_MACHINE,
+        "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\"
+        "Explorer\\Desktop\\Namespace\\" + ShellFolderRoot._reg_clsid_,
+    )
+    winreg.SetValueEx(key, None, 0, winreg.REG_SZ, ShellFolderRoot._reg_desc_)
+    # And special shell keys under our CLSID
+    key = winreg.CreateKey(
+        winreg.HKEY_CLASSES_ROOT,
+        "CLSID\\" + ShellFolderRoot._reg_clsid_ + "\\ShellFolder",
+    )
+    # 'Attributes' is an int stored as a binary! use struct
+    attr = (
+        shellcon.SFGAO_FOLDER | shellcon.SFGAO_HASSUBFOLDER | shellcon.SFGAO_BROWSABLE
+    )
+    import struct
+
+    s = struct.pack("i", attr)
+    winreg.SetValueEx(key, "Attributes", 0, winreg.REG_BINARY, s)
+    print(ShellFolderRoot._reg_desc_, "registration complete.")
+
+
+def DllUnregisterServer():
+    import winreg
+
+    try:
+        key = winreg.DeleteKey(
+            winreg.HKEY_LOCAL_MACHINE,
+            "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\"
+            "Explorer\\Desktop\\Namespace\\" + ShellFolderRoot._reg_clsid_,
+        )
+    except OSError as details:
+        import errno
+
+        if details.errno != errno.ENOENT:
+            raise
+    print(ShellFolderRoot._reg_desc_, "unregistration complete.")
+
+
+if __name__ == "__main__":
+    from win32com.server import register
+
+    register.UseCommandLine(
+        ShellFolderRoot,
+        debug=debug,
+        finalize_register=DllRegisterServer,
+        finalize_unregister=DllUnregisterServer,
+    )