Con esta API:
BOOL SetMenuItemBitmaps(
HMENU hMenu, // handle to menu
UINT uPosition, // menu item
UINT uFlags, // options
HBITMAP hBitmapUnchecked, // handle to unchecked bitmap
HBITMAP hBitmapChecked // handle to checked bitmap
);
http://msdn.microsoft.com/library/de...tembitmaps.asp