ulParam1 (ULONG)

      This parameter can contain any of the following flags:

      MCI_NOTIFY

        A notification message will be posted to the window specified in the hwndCallback parameter of the data structure pointed to by the pParam2 parameter. The notification will be posted when the action indicated by this message is completed or when an error occurs.
      MCI_WAIT
        Control is not to be returned until the action indicated by this message is completed or an error occurs.
      MCI_FROM
        The beginning position of a delete. The position of the media is either the position specified in the ulFrom field or the current position if MCI_FROM is not specified.
      MCI_TO
        The ending position of a delete operation. If MCI_TO is not specified, the end of the file is assumed to be the end of the range to be deleted.

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