None = CloseClipboard()
The CloseClipboard function closes
the clipboard.
Comments
When the window has finished examining or changing the clipboard,
close the clipboard by calling CloseClipboard. This enables other windows
to access the clipboard.
Do not place an object on the clipboard after calling CloseClipboard.
Win32 API References
Search for CloseClipboard at msdn, google or google groups.
Return Value
If the function succeeds, the return value is None.
If the function fails, win32api.error is raised with the GetLastError
info.