http://blogs.msdn.com/b/gautamg/archive/2010/01/05/5-property-provider-of-sample-excel-extension.aspxThis is the fifth post in this series on the extensibility of Coded UI Test . Before reading this, you should read the previous posts of this series to better understand this post. The ExcelPropertyProvider class extends from UITestPropertyProvider .en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)