Microsoft introduced a new type of applications: the Windows Store apps. Windows Store apps have a brand new Windows 8 Metro interface, run on a variety of devices, and you can sell them on the Windows Store. You may create your first Windows Store app using C# or Visual Basic in Visual Studio 2012. We will not teach you how to create a simple "Hello, world!" Windows Store app using Extensible Application Markup Language (XAML) in .NET technology (VB or C#). To learn how to build Windows Store apps go to some Microsoft tutorial website. We just will open VS2012 development environment and compile a blank WinStore application. Open it. Click "NewProject", then "Windows Store". In the center pane, select the Blank App template. After compilation you will see App1 Metro style tile created. By clicking on the tile you will see gray screen. That is it. Press Alt + F4 key combination to close the App1 application. You can easily locate the App1.exe in the Windows Store app project’s folder. You can see the application"s CIL script. CIL - Common Intermediate Language is the lowest- level human-readable programming language is used by the .NET Framework. The Intermediate Language is a language used as the output of .NET compilers (C# or VB). The Refractor .NET assembly browser program that you can freely download from RustemSoft"s websites allows you to see CIL code in human-readable format. By using this utility, you can open any .NET executable file (EXE or DLL) and see CIL code. Moreover, by using the Refractor you will be able to decompile your App1.exe to high-level .NET language: C# or VB. You should not give to code-thefts an ability to use the Refractor or another decompiler utility on your Windows Store app for hacker"s purposes. You should secure your code with a best obfuscator. Obfuscation raises the reverse engineering protection. For the Visual Studio 2016 Windows Store apps Skater .NET Obfuscator makes good and reliable code obfuscation.