| AddMessageHandler([in] IDispatch *Control, LONG Message, VARIANT MessageHandler) | WindowSystemObjectExtensions | |
| CreateClipboard([in, defaultvalue(FALSE)] VARIANT_BOOL ClipboardViewer,[out, retval] IDispatch **Clipboard) | WindowSystemObjectExtensions | |
| CreateExecutor([out, retval] IDispatch **Result) | WindowSystemObjectExtensions | |
| CreateIconBuilder([out, retval] IDispatch **Result) | WindowSystemObjectExtensions | |
| EnumWindows([out, retval] IDispatch **Result) | WindowSystemObjectExtensions | |
| GetFileSysIconIndexLarge([in] BSTR pVal,[in, defaultvalue(0)] ULONG FileAttributes,[out, retval] ULONG *Result) | WindowSystemObjectExtensions | |
| GetFileSysIconIndexSmall([in] BSTR pVal,[in, defaultvalue(0)] ULONG FileAttributes,[out, retval] ULONG *Result) | WindowSystemObjectExtensions | |
| IsThemeActive | WindowSystemObjectExtensions | |
| IsWindows7 | WindowSystemObjectExtensions | |
| IsWindows8 | WindowSystemObjectExtensions | |
| IsWindowsVista | WindowSystemObjectExtensions | |
| IsWindowsXP | WindowSystemObjectExtensions | |
| PostCopyData([in] VARIANT Control,[in] BSTR Data,[out, retval] VARIANT *pVal) | WindowSystemObjectExtensions | |
| PostMessage([in] VARIANT Control, LONG Message, LONG wParam, VARIANT lParam,[out, retval] VARIANT *pVal) | WindowSystemObjectExtensions | |
| RegisterWindowMessage([in] BSTR Message,[out, retval] ULONG *MessageId) | WindowSystemObjectExtensions | |
| SendCopyData([in] VARIANT Control,[in] BSTR Data,[out, retval] VARIANT *pVal) | WindowSystemObjectExtensions | |
| SendMessage([in] VARIANT Control, LONG Message, LONG wParam, VARIANT lParam,[out, retval] VARIANT *pVal) | WindowSystemObjectExtensions | |
| SystemImageListLarge | WindowSystemObjectExtensions | |
| SystemImageListSmall | WindowSystemObjectExtensions | |
| UuidCreate([out, retval] BSTR *Result) | WindowSystemObjectExtensions | |