2. Virtual objects for analog or low-level recording are not supported by QuickTest.
3. Recognition of virtual objects can be disabled without deleting them from the Virtual Object Manager.
4. Virtual objects can only be used when recording and running a test. Any type of checkpoint on a virtual object cannot be inserted.
5. The virtual object collections shown in the Virtual Object Manager are stored on your computer and not with the tests that include virtual object steps. This means that if you use a virtual object in a test step, the object will be recognized during the run session only if it is run on a computer containing the appropriate virtual object definition. To copy your virtual object collection definitions to another computer, copy the contents of your
6. Virtual objects can only be defined for objects on which you can click or double-click and that record a Click or DblClick step. Otherwise, the virtual object is ignored. For example, if you define a virtual object over the WinList object, the Select operation is recorded, and the virtual object is ignored.
7. You cannot use the Object Spy to view the properties of Virtual objects.
[Taken from QTP Guide]