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

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="horizontal"
4. verticalAlign="middle"
5. backgroundColor="white">
7. <mx:TitleWindowid="titleWindow1"
8. showCloseButton="true"
9. title="TitleWindow"
10. status="showCloseButton = true"
11. width="50%"
12. height="100%"/>
14. <mx:TitleWindowid="titleWindow2"
15. showCloseButton="false"
16. title="TitleWindow"
17. status="showCloseButton = false"
18. width="50%"
19. height="100%"/>
21. </mx:Application>