3.1.5.4 GetQWaveSinkInfo

If this event occurs while the device is in the ShellRunning state, the device MUST return IsQWaveSinkRunning and QWaveSinkPortNumber information in the Is Sink Running and Port Number parameters, respectively, as specified in section 2.2.4.

The device MUST return S_OK if the message is processed successfully. Otherwise, the device MUST return an appropriate error code. See [MS-DSLR] section 2.2.2.5 for the possible error codes returned in the DSLR Dispatcher Response Tag Payload.