Windows GUI Library for Office 2013-like windows?
dll, ms-office, user-interface, visual-studio-2013, windows
Solution
There is none. It's a custom Win32 C++ application with a ton of code.
The closest you can get without inventing your own controls is to create a Win32 application that uses the Windows Ribbon Framework. This is only officially accessible through plain Win32. The MFC and WPF versions are non-native look alikes. There is a .NET Windows Forms wrapper for the native Win32 Ribbon.
Problem
Visual Studio 2012 and Office 2013 have in my opinion an amazing GUI. Are they built with some Microsoft library which is publicly accessible and usable; if so which one?