hehey.mxml

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init()">
    <mx:Script>
    	<![CDATA[
    	   
    	   import mx.controls.Alert;
    	   
    	   public function init():void
    	   {
    	       tx.text = "Hey!";
    	   }
    		
    	]]>
    </mx:Script>
    <mx:Canvas id="cnv">
    	<mx:TextArea id="tx" />
    </mx:Canvas>
	
</mx:Application>