Get key code and char code from KeyboardEvent
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Script> private function keyHandler(event:KeyboardEvent):void { trace(event.keyCode + "/" + event.charCode); } </mx:Script> <mx:TextInput id="my_input" keyUp="keyHandler(event)" /> </mx:Application>