XmClipboardUndoCopy(library call)            XmClipboardUndoCopy(library call)

       XmClipboardUndoCopy — A clipboard function that deletes the last item
       placed on the clipboard

       #include <Xm/CutPaste.h>
       int XmClipboardUndoCopy (display, window)
               Display * display;
               Window  window;

       XmClipboardUndoCopy deletes the last item placed on the clipboard if
       the item was placed there by an application with the passed display and
       window arguments. Any data item deleted from the clipboard by the
       original call to XmClipboardCopy is restored. If the display or window
       IDs do not match the last copied item, no action is taken, and this
       function has no effect.

       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 clipboard
                 function it calls.

                 The function was successful.

                 The function failed because the clipboard was locked by
                 another application. The application can continue to call the
                 function again with the same parameters until the lock goes
                 away. This gives the application the opportunity to ask if
                 the user wants to keep trying or to give up on the operation.

       XmClipboardLock(3) and XmClipboardStartCopy(3).

                                             XmClipboardUndoCopy(library call)