rc (USHORT) - returns

      Return codes indicating success or type of failure:

      MMIO_SUCCESS

        If the function succeeds, 0 is returned.
      MMIOERR_UNBUFFERED
        The specified file is not opened for buffered I/O.
      MMIOERR_INVALID_HANDLE
        The handle passed was not valid.
      MMIOERR_INVALID_PARAMETER
        An invalid parameter was passed.
      MMIOERR_READ_ONLY_FILE
        A write-advance operation was requested for a read-only file.
      MMIOERR_WRITE_ONLY_FILE
        A read-advance operation was requested for a file opened as write only.
      MMIOERR_WRITE_FAILED
        A write-advance operation failed.
      MMIOERR_READ_FAILED
        A read-advance operation failed.
      MMIOERR_SEEK_FAILED
        A seek operation prior to a write- or read-advance operation failed.
      MMIOERR_NO_FLUSH_NEEDED
        A write-advance operation was requested for the buffer, but the operation was not required.
      MMIOERR_OUTOFMEMORY
        An advance operation requires a buffer.
      MMIOERR_CANNOTEXPAND
        Unable to expand a MEM file for an advance request.
      MMIOERR_FREE_FAILED
        Unable to free a buffer after expanding a MEM file.

      [Back] [Next]