WindowRef m_overlayWindow;
WindowRef m_overlayParentWindow;
CGContextRef m_overlayContext ;
// we store the window in case we would have to issue a Refresh()
wxWindow* m_window ;
WindowRef m_overlayWindow;
WindowRef m_overlayParentWindow;
CGContextRef m_overlayContext ;
// we store the window in case we would have to issue a Refresh()
wxWindow* m_window ;