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Call this member function to retrieve the window's top level frame window, if any.
CFrameWnd* GetTopLevelFrame( ) const;
Return Value
Identifies the top-level frame window of the window.
The returned pointer may be temporary and should not be stored for later use.
Remarks
If CWnd has no attached window, or its top-level parent is not a CFrameWnd-derived object, this function returns NULL.
Requirements
Header: afxwin.h