Manually verifying a software under development can be time consuming because ofits complexity, but also because of frequent updates to different parts of the system. As thesoftware grows larger, a way of verifying the software automatically withoutuser-interaction is a good approach. Verifying a software systematically and automaticallywill both save time for the developers; and assure that the updated version functions asbefore. This report will present a starting point for automatic testing. This is done incooperation with XperDi, a company developing a plug-in for CAD-software thatcurrently verifies their functionality manually. This was achieved by developing a testingtool that support communication between Windows applications used by the plug-in; thiswas needed to automate the testing process. The reached conclusions during this thesisare promising as a starting point for XperDi; to move from manually to automaticverification. There are however several improvements that this report presents for furtherdevelopment of testing tool.