isCommandChecked()

Description	Determines whether to display a check mark next to the menu item.
Arguments	{arg1}, {arg2},...{argN}
	If the arguments attribute is defined for a menuitem tag, the value of that attribute is passed to the isCommandChecked() function (and to the canAcceptCommand(), receiveArguments(), and setMenuText() functions) as one or more arguments. The arguments attribute is useful for distinguishing between two menu items that call the same menu command.
Returns	A Boolean value indicating whether a check mark should appear next to the menu item.