This message is sent to the IOProc to set or query extended file information.

pmmioinfo (PMMIOINFO)

A pointer to an MMIOINFO data structure.

usMsg (USHORT)

Set to MMIOM_SET.

lParam1 (LONG)

Pointer to the MMEXTENDINFO structure.

lParam2 (LONG)

Contains one of the following flags:

MMIO_SET_EXTENDEDINFO

Sets extended information.
MMIO_QUERY_EXTENDEDINFO_BASE
Query only the information of MMEXTENDINFO structure.
MMIO_QUERY_EXTENDEDINFO_ALL
Query all extended information including the CODEC associated information.

rc (ULONG)

Return codes indicating success or failure:

MMIO_SUCCESS

The set is completed successfully.
MMIO_ERROR
An error code is returned.

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