Does Microsoft Office 2010 make use of WPF or is it plain old MFC?

Question

I have been using WPF for some time now and I am trying to reproduce some of the nifty UI features of their office suite. Although very easy in WPF, I am wondering how it could be done using MFC feature packs (I might have to use it instead, since my company has not yet approved the use of WPF). Since the Fluent UI was introduced with Office 2007, I am wondering if Microsoft actually uses WPF in anything else than VS2010 or Expression Blend and particularly in Office 2010. I hope that this question is not off topic.