DeleteMenu
short menuID ; ID of the menu to remove
This removes a menu from the menu list without deallocating its memory.
menuID is the ID of the menu (and NOT a menu handle). It is the menuID
value used in a previous call to NewMenu or the ID of a menu read
Notes: It is recommended that you use DisableItem to disable a temporarily-unneeded menu, rather than deleting it. This avoids conf using
the user who expects menu items to stay put.
Note that this does not release the memory used by the menu's MenuInfo read from a resource) to free up the memory used by a menu.