SWFLoader init event
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" > <mx:Script> import mx.managers.SystemManager; import mx.events.FlexEvent; private function initHandlerFunction(event:Event):void { event.target.content.addEventListener(FlexEvent.APPLICATION_COMPLETE,applicationCompleteHandler); } private function applicationCompleteHandler(event:Event):void { event.target.application.flexApp2Function("test"); } </mx:Script> <mx:SWFLoader source="a.swf" init="initHandlerFunction(event)" /> </mx:Application>