class
 WindowEvent
            WINDOW_ACTIVATED:String        
                            WINDOW_ADDED:String        
                            WINDOW_BEFORE_CLOSED:String        
                            WINDOW_CLOSED:String        
                            WINDOW_DEACTIVATED:String        
                            WINDOW_MAXIMIZED:String        
                            WINDOW_MINIMIZED:String        
                            WINDOW_REMOVED:String        
                            WINDOW_RESTORED:String        
                            WINDOW_TITLE_CHANGED:String        
                    