pszFileName (PSZ) - input

The file name to be identified.

pmmioinfo (PMMIOINFO) - input

A pointer to the MMIOINFO buffer that might contain additional data. Normally this is NULL, but is needed for compound-file elements when they are not fully qualified.

pfccStorageSystem (PFOURCC) - output

Pointer to the FOURCC code of the storage system that gets returned upon successful completion.

rc (ULONG) - returns

Return codes indicating success or type of failure. For more information about DOS File errors, use the mmioGetLastError function.

MMIO_SUCCESS

If the function succeeds, 0 is returned.
MMIO_ERROR
The specified file is not a storage-system type.
MMIOERR_INVALID_PARAMETER
An invalid parameter was passed.
MMIOERR_INTERNAL_SYSTEM
An internal system error occurred.

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