ulParam1 (ULONG)

      This parameter can contain any of the following flags:

      MCI_NOTIFY

        A notification message is posted to the window specified in the hwndCallback field of the data structure identified by pParam2 when the action indicated by this message is completed.
      MCI_WAIT
        Control is not returned until the action indicated by this message is completed.
      MCI_MIXSETUP_INIT
        Initializes the mixer for the correct mode according to the value specified in the ulFormatMode field of MCI_MIXSETUP_PARMS.
      MCI_MIXSETUP_DEINIT
        Deinitializes the mixer.
      MCI_MIXSETUP_QUERYMODE
        Queries a device to see if a specific mode is supported.

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