WM_UNDO Overview  Group

An application sends a WM_UNDO message to an edit control to undo the last operation. When this message is sent to an edit control, the previously deleted text is restored or the previously added text is deleted.

WM_UNDO 

wParam = 0; // not used; must be zero 

lParam = 0; // not used; must be zero 

 

Parameters

This message has no parameters.

Return Values

If the message succeeds, the return value is TRUE; otherwise, it is FALSE.

See Also

WM_CLEAR, WM_COPY, WM_CUT, WM_PASTE