Using the Alert control
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" verticalAlign="middle" backgroundColor="white"> <mx:Script> import mx.controls.Alert; private var alert:Alert; private function showAlert():void { var text:String = "Hello World"; var title:String = "title"; alert = Alert.show(text, title, Alert.YES | Alert.NO); } </mx:Script> <mx:Button label="Alert.show()" click="showAlert();" /> </mx:Application>