How to set XP style for Visio COM addin?

[Newspear]

I use Visual Basic.Net and Visio 2003 to develop a COM addin. There are some
dialog forms with the old style and inconsistent with Windows XP and Visio.
Please tell me how change the controls into XP style? Thanks

 

[visi3d]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwxp/html/xptheming.as