This parameter contains one of the following flags:
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
Set the extended information.
MMIO_QUERY_EXTENDEDINFO_BASE
Query
only the information of the MMEXTENDINFO
structure.
MMIO_QUERY_EXTENDEDINFO_ALL
Query
all extended information including the CODEC associated information.