virtual ~wxMemoryDCImpl();
-#if wxUSE_GRAPHICS_CONTEXT
- virtual wxGraphicsContext* CreateGraphicsContext();
-#endif
-
// these get reimplemented for mono-bitmaps to behave
// more like their Win32 couterparts. They now interpret
// wxWHITE, wxWHITE_BRUSH and wxWHITE_PEN as drawing 0