How to add event listener?

i want to add event listener when i click on a button in mxml, the event listener should be added in the action script file, how to do this?
can anyone help? urgent!!!

Hi Lakshmi,
You can do this just put all the script in the mxml block in seperate AS file as shown below... Observe that I have included an AS file named Script.as and removed the script block form mxml and moved to this Script.as file. Place the Script.as file in your src folder ....
// Main mxml file....
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="onCreationComplete()">
    <mx:Script source="Script.as"/>
<mx:TextArea id="textArea" width="300" height="100" />
<mx:Button id="myButton" label="Click ME"/>
</mx:Application>
//Script.as file
import mx.controls.Alert;
            private function onCreationComplete():void
             myButton.addEventListener(MouseEvent.CLICK, onButtonClick);
            private function onButtonClick(event:MouseEvent):void
             Alert.show("Button is Clicked");
Thanks,
Bhasker

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qdudu wrote:
Hello all,
I'm quite new to the whole OOP thing, and one of the things I keep wondering about is this:
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================
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