Pass event object into Click event
<?xml version='1.0' encoding='UTF-8'?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
import mx.controls.Alert;
import mx.events.ItemClickEvent;
public function showMsg(anEvent:ItemClickEvent):void {
Alert.show(anEvent.currentTarget.selectedValue);
}
</mx:Script>
<mx:RadioButtonGroup id="Spam" itemClick="showMsg(event)" />
</mx:Application>
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