PerfIsGroupOnInGroupMask - NtDoc

#ifndef _NTWMI_H

FORCEINLINE
BOOLEAN
PerfIsGroupOnInGroupMask(
    _In_ ULONG Group,
    _In_ PPERFINFO_GROUPMASK GroupMask
    )
{
    PPERFINFO_GROUPMASK TestMask = GroupMask;

    return (BOOLEAN)(((TestMask) != NULL) && (((TestMask)->Masks[PERF_GET_MASK_INDEX((Group))] & PERF_GET_MASK_GROUP((Group))) != 0));
}

#endif
View code on GitHub