rc (ULONG) - returns

      Return codes indicating success or type of failure:

      MCI_NOTIFY_SUCCESS

        If the function succeeds, 0 is returned.
      MM_MCIPOSITIONCHANGE
        The media position in MMTIME units.
      MM_MCICUEPOINT
        Media position in MMTIME units.
      MM_MCIPLAYLISTMESSAGE
        Parameter specified by playlist message instruction (Operand 2).
      MM_MCIEVENT
        Device-specific parameter.

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