rc (ULONG) - returns

      Return code.

      MCIERR_SUCCESS

        Error code returned indicating success or type of failure.
      MCIERR_INVALID_DEVICE_ID
        The device ID is not valid.
      MCIERR_OUTOFRANGE
        The error code specified is not valid.
      MCIERR_INVALID_BUFFER
        The buffer address specified is not valid.

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