XmClipboardUnlock unlocks the clipboard,
enabling it to be accessed by other applications.
If multiple calls to XmClipboardLock have occurred, the same
number of calls to XmClipboardUnlock is necessary to unlock the
clipboard, unless remove_all_locks is set to True.
display
Specifies a pointer to the Display structure that was returned in a
previous call to XOpenDisplay or XtDisplay.
window
Specifies the window ID of a widget that relates the application window to the
clipboard. The widget's window ID can be obtained through
XtWindow.
The same application instance should pass the same window ID to each of the
clipboard functions that it calls.
remove_all_locks
When True, indicates that all nested locks should be removed. When False,
indicates that only one level of lock should be removed.
RETURN
XmClipboardSuccess
The function was successful.
XmClipboardFail
The function failed because the clipboard was not locked or was locked
by another application.