Flex中如何通过showCloseButton属性，控制TitleWindow右上角关闭按钮有效/无效

main.mxml

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

layout="horizontal"

verticalAlign="middle"

backgroundColor="white">



<mx:TitleWindow id="titleWindow1"

showCloseButton="true"

title="TitleWindow"

status="showCloseButton = true"

width="50%"

height="100%" />



<mx:TitleWindow id="titleWindow2"

showCloseButton="false"

title="TitleWindow"

status="showCloseButton = false"

width="50%"

height="100%" />



</mx:Application>