FlashMenuBar
short menuID ; ID of menu title; 0=invert entire menu bar
You can use this to invert an individual menu title or to invert the entire
menu bar. Call it twice to actually "flash" a title or menu bar.
menuID is your internal ID for a menu (if created via NewMenu) or the 'MENU' resource ID of a menu (if read in via GetMenu or GetNewMBar). If menuID =0 (or any invalid menu ID), then the entire menu bar is inverted.
Notes: Since the HiliteMenu function does this for any individual menu title, the only reason you might need this is if you wish to attract the user's attention