For at vælge et bestemt vindue i et program, skal både vinduesklasse og vinduesrolle vælges. Vinduesklassen vil afgøre programmet og vinduesrollen det specifikke vindue i programmet. Mange programmer sørger dog ikke for nyttige vinduesroller.
For selecting a specific window in an application, both window class and window role should be selected. Window class will determine the application, and window role the specific window in the application; many applications do not provide useful window roles though.