This message is sent to the I/O procedure to request that data for one or more tracks be written to a multiple-track file. The data for the tracks will be interleaved by the I/O procedure.

pmmioinfo (PMMIOINFO)

A pointer to an MMIOINFO data structure.

usMsg (USHORT)

Set to MMIOM_MULTITRACKWRITE.

lParam1 (LONG)

Pointer to the MMMULTITRACKWRITE structure.

lParam2 (LONG)

Not used.

rc (ULONG)

Return codes indicating success or failure:

MMIO_SUCCESS

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

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