Flex中如何利用headerSeparatorSkin样式，去掉DataGrid头部分割符

下面是main.mxml：

1. <? xml version = " 1.0 " encoding = " utf-8 " ?>
2. < mx:Application name = " DataGrid_headerSeparatorSkin_test "
3. xmlns:mx = " http://www.adobe.com/2006/mxml "
4. backgroundColor = " white " >
6. < mx:DataGrid id = " dataGrid "
7. headerSeparatorSkin = " mx.skins.ProgrammaticSkin " >
8. < mx:dataProvider >
9. < mx:ArrayCollection >
10. < mx:Object c1 = " 1. One " c2 = " 1. Two " c3 = " 1. Three " />
11. < mx:Object c1 = " 2. One " c2 = " 2. Two " c3 = " 2. Three " />
12. < mx:Object c1 = " 3. One " c2 = " 3. Two " c3 = " 3. Three " />
13. < mx:Object c1 = " 4. One " c2 = " 4. Two " c3 = " 4. Three " />
14. < mx:Object c1 = " 5. One " c2 = " 5. Two " c3 = " 5. Three " />
15. < mx:Object c1 = " 6. One " c2 = " 6. Two " c3 = " 6. Three " />
16. </ mx:ArrayCollection >
17. </ mx:dataProvider >
18. </ mx:DataGrid >
20. </ mx:Application >