make my gtk buttons more windows-like

How can I get my gtk buttons to look more like standard windows buttons? In this particular example, I have OK an开发者_如何学Cd Cancel buttons, but they're a different size than the OK and Cancel buttons in every windows app. How can I change their size to look more like windows'?

I couldn't immediately see any ways to do it programmatically, but it appears that you can set per-application GTK themes according to this page. There are GTK themes that appear more Windows-like, I believe.