The GetSelect function method retrieves the selected items within a graphic window.
            Example
            p = PLOT(/TEST, LAYOUT=[2,1,1])
            c = CONTOUR(/TEST, LAYOUT=[2,1,2], /CURRENT)
            
            
            graphics = p.Window.GetSelect()
            Syntax
            Result = window.GetSelect( )
            Return Value
            The result is an array of graphics items, or !NULL if nothing is currently selected.
            Arguments
            None
            Keywords
            None
            Version History
            
            See Also
            Select Method,
			GETWINDOWS