Determines the number of sound mixer devices available on the host.
PRL_RESULT PrlSrvCfg_GetSoundMixerDevsCount( PRL_HANDLE hSrvConfig, PRL_UINT32_PTR pnSoundMixerDevsCount );
PrlApiDisp.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.