The class driver sends this request to signal the minidriver that it has completed its initialization.
Once the minidriver completes this request, the class driver can begin to send SRB_OPEN_STREAM requests.
When this SRB is received by the minidriver, the minidriver should create any necessary Registry entries. For example, a DirectShow filter might register a TV tuner or Crossbar for use with the FilterGraph using the StreamClassRegisterFilterWithNoKSPins routine.