hmmio (HMMIO) - input

The open file handle returned by mmioOpen.

usFlags (USHORT) - input

Contains none or the following flag:

MMIO_EMPTYBUF

Empties the I/O buffer. The allocated buffer is not dropped, but the calling mmioGetInfo will reveal that the pchNext field of the MMIOINFO structure will point to pchEndRead.

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_CANNOTWRITE
The buffer could not be written to the disk. The disk could be full.
MMIOERR_WRITE_FAILED
The buffer could not be written to the disk. This is a possible hardware problem.
MMIOERR_NO_BUFFER_ALLOCATED
A buffer was expected but was not present.
MMIOERR_NO_FLUSH_NEEDED
A mmioFlush function was requested, but the buffer was empty.
MMIOERR_NO_FLUSH_FOR_MEM_FILE
A mmioFlush was requested on a MEM file.

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