Specify a listener function for the Button control's click event

        
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        import mx.controls.Alert;
        private function myEventHandler(event:Event):void {
            Alert.show("An event occurred");
        }
      </mx:Script>
    <mx:Button id="b1" label="Click Me" click="myEventHandler(event)" />
</mx:Application>

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Specify a listener function for the Button control's click event : Button Event « Components « Flex

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