You can use virtual objects only when recording and running a test. You cannot insert any type of checkpoint on a virtual object, or use the Object Spy to view its properties.
To perform an operation in the Active Screen on a marked virtual object, you must first record it, so that its properties are saved in the test object description in the object repository. If you perform an operation in the Active Screen on a virtual object that has not yet been recorded, QuickTest treats it as a standard object.