http://blogs.msdn.com/b/vstsqualitytools/archive/2010/04/13/uitest-framework-winforms-plugin-part-1.aspxIntroduction UITest framework supports Windows Forms (in short Winforms) applications developed using .Net 2.0/3.5/4.0 framework. Ituses MSAA (Microsoft Active Accessibility) which is a part of Windows Automation API 2.0 to drive the automation on Winformsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)