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_CAPTURE_RECT
        Indicates that a region of the screen to be captured is provided in the rect field of the MCI_CAPTURE_PARMS structure pointed to by pParam2.
      MCI_CONVERT
        Specifies that the captured image data will be converted to the OS/2 bit-map format when it is saved to disk.

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