The following code illustrates how to determine whether a device has microphone input capability.

               /* Determine if amp/mixer device has a microphone input */

   MCI_CONNECTORINFO_PARMS conninfoparms;
   ULONG rc;
   ULONG NumMicConns;

   conninfoparms.ulDeviceTypeID = MCI_DEVTYPE_AUDIO_AMPMIX;
   conninfoparms.ulConnectorType = MCI_MICROPHONE_CONNECTOR;


   rc = mciSendCommand (0,           /* Ignored field              */
     MCI_CONNECTORINFO,              /* Connectorinfo message      */
     MCI_ENUMERATE_CONNECTORS | MCI_WAIT | MCI_CONNECTOR_TYPE,
                                     /* Flags for this message     */
     (PVOID) &conninfoparms,         /* Data structure             */
     0);                             /* No user parm               */
   if (LOUSHORT(rc) == MCIERR_SUCCESS)
      {
       NumMicConns = conninfoparms.ulReturn; /* Return information */
     }