NAME
	OnMenu -- Enable the given menu or menu item.

    SYNOPSIS
	OnMenu( Window, MenuNumber )
	        A0      D0

	VOID OnMenu( struct Window *, UWORD );

    FUNCTION
	This command enables a sub-item, an item, or a whole menu.
	This depends on the contents of the data packed into MenuNumber,
	which is described in the Intuition Reference Manual.

    INPUTS
	Window = pointer to the window
	MenuNumber = the menu piece to be enables

    RESULT
	None

    BUGS

    SEE ALSO
	OffMenu(), ResetMenuStrip()