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Listen for a Keyboard Event

<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300" keyDown="keyHandler(event)" backgroundColor="#0000ff">     <mx:Script>                      import flash.events.KeyboardEvent;             private function keyHandler(event:KeyboardEvent):void             {                 switch(event.keyCode)                 {                     case 13:                         trace(" Enter pressed ");                     break;                     case 32:                         trace(" Space Bar pressed ");                     break;                     case 16:                         trace(" Shift Key pressed ");                     break;                     case 112:                         trace(" F1 pressed ");                     break;                     case 8:                         trace(" Delete pressed ");                     break;                 }             }            </mx:Script>     <mx:Button label="One"/> </mx:HBox> </mx:Application>