flex 注册事件
< ?xml version="1.0" encoding="utf-8"?><mx :Application xmlns:mx="http://www.adobe.com/2006/mxml" viewSourceURL="src/HandlingEventsActionScript/index.html"horizontalAlign="center" verticalAlign="middle" width="300" height="200"creationComplete="creationCompleteHandler(event);"></mx><mx :Script>< ![CDATA[import flash.events.MouseEvent;import mx.events.FlexEvent;private function creationCompleteHandler(event:FlexEvent):void{// Listen for the click event on the Button controlmyButton.addEventListener (MouseEvent.CLICK, clickHandler);}private function clickHandler ( event:Event ):void{myLabel.text = "Hello, World!";}]]></mx><mx :Panel title="My Application" horizontalAlign="center"paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10"><mx :Label id="myLabel" width="180" fontWeight="bold" fontSize="24"/><mx :Button id="myButton" label="Click Me!" /></mx>?