public static extern int SetMenuItemBitmaps(HMenu hmenu, int nPosition, MFMENU uflags, IntPtr hBitmapUnchecked, IntPtr hBitmapChecked);
public static extern bool InsertMenu(HMenu hmenu, int position, MFMENU uflags, IntPtr uIDNewItemOrSubmenu, string text);
public static extern bool AppendMenu(HMenu hmenu, MFMENU uflags, IntPtr uIDNewItemOrSubmenu, string text);