CWnd::OnNcDestroy 

afx_msg void OnNcDestroy( );

Remarks

Called by the framework when the nonclient area is being destroyed, and is the last member function called when the Windows window is destroyed. The default implementation performs some cleanup, then calls the virtual member function PostNcDestroy.

Override PostNcDestroy if you want to perform your own cleanup, such as a delete this operation. If you override OnNcDestroy, you must call OnNcDestroy in your base class to ensure that any memory internally allocated for the window is freed.

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See Also   CWnd::DestroyWindow, CWnd::OnNcCreate, WM_NCDESTROY, CWnd::Default, CWnd::PostNcDestroy