Recently we've created code interacting with Win32 and Web. Now it's time to expand the coverage to the .NET area. For this purpose we have dedicated library called UI Automation. This library is provided with .NET framework and contains basic API interacting with window objects. At the same time this library can be used for interaction with the standard Win32 controls, however it can be used as an auxiliary modules to expand the coverage of existing library I created before for interacting with Win32 elements. In this article I will create sample control classes and make some demo showing how it works. Also, in this example I'll take the tab control and create simple tests interacting with it. At this point that would be just stand-alone library but in the future it will be integrated into entire Sirius project.