This message indicates to the physical device driver that a specific stream instance will become the active stream instance. The pSetupParm field is used for device-specific information. Typically, it is used to pass the current stream time from the stream handler to the PDD because a seek might have been requested on the stream prior to the stream start; thus, the PDD should adjust its time to this new reference time. Time is passed as a pointer to the time in milliseconds.