如何绑定动态生成的TextArea的字体大小属性

[calc]

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init();">
	<mx:Script>
		<![CDATA[
			import mx.controls.TextArea;
			
			[Bindable]
			public var size:uint=12;
			
					    
		    public function setTextStyles():void
		    {
		    	size=uint(fontSizeCombo.text);
		    }
		   
		]]>
	</mx:Script>
		<mx:Array id="fontSizeArray"> 
		<mx:String>8</mx:String>
		<mx:String>9</mx:String>
		<mx:String>10</mx:String>
		<mx:String>11</mx:String>
		<mx:String>12</mx:String>
		<mx:String>14</mx:String>
		<mx:String>16</mx:String>
		<mx:String>18</mx:String>
		<mx:String>20</mx:String>
		<mx:String>22</mx:String>
		<mx:String>24</mx:String>
		<mx:String>26</mx:String>
		<mx:String>28</mx:String>
		<mx:String>36</mx:String>
		<mx:String>48</mx:String>
		<mx:String>72</mx:String>
	</mx:Array>
	
	<mx:TextArea id="t1" x="129" y="421.65" enabled="true" text="asdbsadfweqr" 
		color="#C40E0E" editable="true" fontSize="{size}" fontWeight="bold" fontStyle="italic" 
		textDecoration="underline" selectable="false" horizontalScrollPolicy="off" 
		verticalScrollPolicy="off" 
		 mouseDown="startDragit(event);" mouseUp="stopDragit(event)" borderColor="#28C709" borderThickness="1"  cornerRadius="0" backgroundAlpha="0.0" focusEnabled="false" focusAlpha="0" fontFamily="Times New Roman"/>
	<mx:ComboBox id="fontSizeCombo" editable="true"	dataProvider = "{fontSizeArray}"
				close="setTextStyles();"
				enter="setTextStyles();"/>
	
</mx:Application>

以上代码是把TextArea的fontSize属性与变量size进行了绑定操作。通过修改ComboBox就可以更新TextArea的字体大小了。

那么如果我是动态生成的TextArea （var ta:TextArea=new TextArea();）要如何对他们属性进行绑定，还是不可以绑定？

[listart]

import mx.binding.utils.*;
public function initBindingHandler():void {
BindingUtils.bindProperty(this, "size", t1, "text");
}