hmmio (HMMIO) - input
pUserExtendmminfo (PMMEXTENDINFO) - input
ulFlags (ULONG) - input
Note: To reference a track other than the default track with the QUERY and SET calls, the MMIO_TRACK and MMIO_CODEC_ASSOC flags must be set at the same time the QUERY or SET is performed.
MMIO_SET_EXTENDEDINFO
rc (ULONG) - returns
MMIO_SUCCESS