flex s:TextArea 回车交付数据

flex s:TextArea 回车提交数据
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<s:TextArea  id="infoText"  maxChars="30" width="100%" height="23"  alpha=".2"   />

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var config:Configuration = TextFlow.defaultConfiguration;
config.manageEnterKey = false;

Object(infoText.textDisplay).textFlow = new TextFlow(config);


infoText.addEventListener(KeyboardEvent.KEY_DOWN,sendInfo);

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protected function sendInfo(event:*):void
{
   if((event is KeyboardEvent)&&event.charCode!="13")return;
   //...
}