UI automation is a programmatic interface to the user interface of your application to external applications that may be interested in programmatic communication with your UI. In fact, UI automation is the prime facilitator for accessibility features in Windows where external applications such as screen readers that have no clue about your application, can still interact with your application easily.
I was acquainted with UI automation during my tenure at Microsoft in 2005 when I started working as software developer in test within Visual Studio Team Architects team on a project called Whitehorse. For those who need some background, Whitehorse consisted of SOA diagrams within Visual Studio (you can learn more about this project in the MSDN magazine here). Testing of visual designers in the product test team was done entirely using an internal UI test automation framework built on top of Microsoft Active Accessibility framework.
The UI automation framework is relatively new to Windows platform and successor to Windows Active Accessibility. The framework provides a unified way to discover UI controls in an application built using any of the following desktop technologies: Win32, Windows Forms or WPF.
UI automation has several benefits when used in applications:
Смотри проект CalculatorTests в TFS project dmd-dev2\Training\Work