SetItemMark
To place/remove any character as item mark, use the SetItemMark method.
SetItemMark theMenu as MenuHandle, whichItem as Integer, ASCmark as Integer
theMenu handle of a desired menu.
whichItem ID of an item in theMenu.
ASCmark char for mark; 0 = remove.
Description:
Places or removes a character mark on a menu item.
Supported platforms:
* MacOS PPC
* MacOS Carbon
* MacOS 68k
Unsupported platforms:
* Windows x86