Development Flex



    
        
            import mx.controls.Alert;
            protected function sampleOpenHandler(event:Event):void {
                Alert.show('open');
            }
            protected function sampleProgressHandler(event:ProgressEvent):void {
                Alert.show(event.bytesLoaded+' of '+event.bytesTotal+' bytes loaded');
            }
            protected function sampleCompleteHandler(event:Event):void {
                Alert.show('complete');
            }
      
    

                      open="sampleOpenHandler(event)"
                  progress="sampleProgressHandler(event)"
                  complete="sampleCompleteHandler(event)"/>