Add itself to event handler

           
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
    layout="absolute">
    <mx:Script>
        
        private function fillLabel(evt:Event):void
        {
            myLabel.text = evt.target.label;
            myButton2.addEventListener(MouseEvent.CLICK,fillLabel);
        }
      
    </mx:Script>
    <mx:Panel x="320" y="127" width="250" height="200" layout="absolute"
        title="Testing Events">
        <mx:Label x="55" y="45" id="myLabel" />
        <mx:Button label="Test" id="myButton" x="90" y="96"
            click="fillLabel(event)" />
        <mx:Button label="Test 2" id="myButton2" x="90" y="126" />
    </mx:Panel>
</mx:Application>

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Add itself to event handler : Event Handler « Event « Flex

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