BCGControlBar Pro for MFC
virtual BOOL CBCGPVisualManager::OnSetWindowRegion ( CWnd *  pWnd,
CSize  sizeWindow 

Called by the framework when a region has been set for frames and popup menus.

This method is used as a notification that a region has been set for all frames and popup menus. It's required to implement windows with non-rectangular edges.

pWndA pointer to window whose region has been changed.
sizeWindowSize of the window.