The PDH_STATISTICS structure is used to return the statistics of the values in an array of raw counters managed by the application program. The format of the data in the PDH_FMT_COUNTERVALUE structure is described in the dwFormat member.
typedef struct _PDH_STATISTICS {
DWORD dwFormat;
DWORD count;
PDH_FMT_COUNTERVALUE min;
PDH_FMT_COUNTERVALUE max;
PDH_FMT_COUNTERVALUE mean;
} PDH_STATISTICS, *PPDH_STATISTICS;
Performance Data Helper Overview, Performance Data Structures, PdhComputeCounterStatistics, PDH_FMT_COUNTERVALUE