The SNAGetPerfValues function is used to provide pointers to the ServiceNameIndex and FirstCounterIndex variables so that the Perfmon application knows where to get the descriptions of the performance counters from the registry. These variables are returned as members in the ADAPTERPERFDATA structure returned by the SNAGetLinkPerfArea function.
USHORT SNAGetPerfValues(
int *pServiceNameIndex,
int *pFirstCounterIndex
);
ADAPTERPERFDATA, SNAGetLinkPerfArea