Creating event dispatching in custom class

Question

I have been trying to create an event dispatcher in a custom
data transfer object class. It's a simple class and I don't know
how to make it dispatch an event. I tried extending the
EventDispatcher class but that doesn't appear to work either. Any
help would be greatly appreciated.

Answer 1

I have attached the code for the application and the custom
class. This should work from what I have read, but I can not get
the application to catch the event.
APPLICATION
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
creationComplete="initThis()" layout="absolute">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
private var _tester:TestClass = new TestClass();
private function initThis():void{
addEventListener(TestClass.TEST_ACTION, onTestHandler);
private function onTestHandler(event:Event):void{
Alert.show("Event Dispatched");
]]>
</mx:Script>
<mx:Button x="312" y="150" label="Button"
click="{_tester.testEvents()}"/>
</mx:Application>
CLASS
package
import flash.events.EventDispatcher;
import flash.events.Event;
public class TestClass extends EventDispatcher
public static const TEST_ACTION:String = "test";
public function testEvents():void{
dispatchEvent(new Event(TestClass.TEST_ACTION));
}