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Using an event object to pass information about selected tab

<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white">     <mx:Script>                  import mx.controls.Alert;         import mx.events.IndexChangedEvent;         private function handleChange(evt:IndexChangedEvent):void         {             Alert.show(evt.currentTarget.selectedIndex + " Label: " + evt.currentTarget.selectedChild.label);         }            </mx:Script>     <mx:TabNavigator width="200" height="100" id="myTabNav" change="handleChange(event)">     </mx:TabNavigator> </mx:Application>