Anyone know what control this is or how I add it, if it can be used in WPF?

I’m referring to the menu: File | Home | Page Layout | Mailings | etc
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You probably mean the Ribbon.
You are lucky, there has just been an official release from Microsoft, so you do not need any external libraries.
http://10rem.net/blog/2010/08/02/announcing-microsoft-ribbon-for-wpf-rtw