I'd like to know how to create a program interface like the one used in Visual Studio, Office 2013, GitHub for Windows, etc.
Looks like Cosmopolitan Theme for WPF is not the same theme used on those softwares.
To show you the difference between these programs interfaces and common others take a look at those printscreens:
Interfaces I wanna know how to build:
Visual Studio:

Office 2013 (Excel):

GitHub for Windows:

Common Interface:

The difference between these programs is its interfaces. I already downloaded the Visual Studio Express for Windows 8, Visual Studio Express for Windows Desktop and I also looked at Visual Studio Ultimate, but them doesn't have the option the build such kind of interfaces when you create a "New Project...".
Do I need to install a new Template on my VS to be able to build such kind of interface? I think it's some sort of theme for WPF. I'd like to see proves that those applications use this UI style you refer in your answer. Thanks.