| Microsoft DirectX 8.1 (Visual Basic) | 
Stops an effect that is playing.
object.Stop()
If the method fails, an error is raised and Err.Number may be set to one of the following:
| DIERR_NOTEXCLUSIVEACQUIRED | 
| DIERR_NOTINITIALIZED | 
The device must be acquired at the exclusive cooperative level for this method to succeed.