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_INFO_PRODUCT
        This flag returns a description of the particular hardware associated with a device.
      CD Audio Extensions

      The following additional flags apply to CD audio devices:

      MCI_CD_INFO_ID

        This flag returns the disc ID (8 bytes) consisting of the starting address, ending track number, and address of the lead-out track. The disc ID is generated by the CD Audio MCD and is not necessarily unique.
      MCI_CD_INFO_UPC
        This flag returns the disc's UPC code (serial number) if the device supports this function; otherwise it returns 0. The UPC is BCD coded. Not all discs have UPCs.
      CD-XA Extensions

      The following additional flags apply to CD-XA devices:

      MCI_CD_INFO_UPC

        This flag returns the disc's UPC code (serial number) if the device supports this function; otherwise, it returns 0. The UPC is BCD coded. Not all discs have UPCs.
      MCI_INFO_FILE
        This flag returns the file name of the current file.
      Digital Video Extensions

      The following additional flags apply to digital video devices:

      MCI_DGV_INFO_VIDEO_FILE

        This flag returns the file name of the current digital video file used by the device.
      MCI_DGV_INFO_IMAGE_FILE
        This flag returns the file name of the current image file used by the device.
      MCI_DGV_INFO_TEXT
        This flag returns the caption of the window in which the digital video is currently displayed.
      MCI_DGV_INFO_REGION
        This flag returns the name of the current tuner region.
      MCI_DGV_INFO_REGION_TEXT
        This flag returns a description of the current tuner region.
      Sequencer Extensions

      The following additional flags apply to sequencer devices:

      MCI_INFO_FILE

        This flag returns the file name of the current file.
      Videodisc Extensions

      The following additional flags apply to videodisc devices:

      MCI_VD_INFO_LABEL

        This flag returns the videodisc label.
      Video Overlay Extensions

      The following additional flags apply to video overlay devices:

      MCI_INFO_FILE

        This flag returns the file name of the current file.
      MCI_OVLY_INFO_TEXT
        This flag returns the caption of the window in which the video overlay is currently displayed.
      Wave Audio Extensions

      The following additional flags apply to wave audio devices:

      MCI_INFO_FILE

        This flag returns the file name of the current file.

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