NtConvertBetweenAuxiliaryCounterAndPerformanceCounter - NtDoc

#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)
#if (PHNT_VERSION >= PHNT_REDSTONE2)

// rev
NTSYSCALLAPI
NTSTATUS
NTAPI
NtConvertBetweenAuxiliaryCounterAndPerformanceCounter(
    _In_ BOOLEAN ConvertAuxiliaryToPerformanceCounter,
    _In_ PLARGE_INTEGER PerformanceOrAuxiliaryCounterValue,
    _Out_ PLARGE_INTEGER ConvertedValue,
    _Out_opt_ PLARGE_INTEGER ConversionError
    );

#endif
#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwConvertBetweenAuxiliaryCounterAndPerformanceCounter(
    _In_ BOOLEAN ConvertAuxiliaryToPerformanceCounter,
    _In_ PLARGE_INTEGER PerformanceOrAuxiliaryCounterValue,
    _Out_ PLARGE_INTEGER ConvertedValue,
    _Out_opt_ PLARGE_INTEGER ConversionError
    );

#endif
View code on GitHub