Flex中如何利用closeButtonSkin或closeButtonUpSkin, closeButtonOverSkin, closeButtonDownSkin, closeButtonDisabledSkin样式，改变TitleWindow容器的

 main.mxml

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
3.         layout="vertical"
4.         verticalAlign="middle"
5.         backgroundColor="white">
6.  
7.     <mx:Style>
8.         TitleWindow {
9.             closeButtonSkin: Embed("cancel.png");
10.             /* Set values from defaults.css to null. */
11.             closeButtonDisabledSkin: ClassReference(null);
12.             closeButtonDownSkin: ClassReference(null);
13.             closeButtonOverSkin: ClassReference(null);
14.             closeButtonUpSkin: ClassReference(null);
15.         }
16.     </mx:Style>
17.  
18.     <mx:TitleWindow id="titleWindow"
19.             title="TitleWindow"
20.             status="status message"
21.             showCloseButton="true"
22.             width="100%"
23.             height="100%" />
24.  
25. </mx:Application>