hmmio (HMMIO) - input

      The open file handle returned by mmioOpen.

    pckinfo (PMMCKINFO) - input

      A pointer to the MMCKINFO structure that was filled by mmioDescend or mmioCreateChunk.

    usFlags (USHORT) - input

      Reserved for future use and must be set to zero.

    rc (USHORT) - returns

      Return codes indicating success or type of failure:

      MMIO_SUCCESS

        If the function succeeds, 0 is returned.
      MMIOERR_INVALID_HANDLE
        The handle passed was not valid.
      MMIOERR_INVALID_PARAMETER
        The parameter passed was not correct.
      MMIOERR_CANNOTWRITE
        The I/O buffer needs to be written to disk but disk space is lacking.

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