#ifndef _NTRTL_H
#if (PHNT_VERSION >= PHNT_WINDOWS_10_21H2)

/**
 * The RtlGetSystemTimeAndBias routine returns the current system time together with the current time zone bias and the effective range of that bias.
 *
 * \param TimeZoneBias A pointer to a variable that receives the current time zone bias, in 100-nanosecond intervals.
 * \param TimeZoneBiasEffectiveStart An optional pointer to a variable that receives the time at which the current bias became effective.
 * \param TimeZoneBiasEffectiveEnd An optional pointer to a variable that receives the time at which the current bias ceases to be effective.
 * \return ULONGLONG The current system time, in 100-nanosecond intervals since January 1, 1601 (UTC).
 */
NTSYSAPI
ULONGLONG
NTAPI
RtlGetSystemTimeAndBias(
    _Out_ PLARGE_INTEGER TimeZoneBias,
    _Out_opt_ PLARGE_INTEGER TimeZoneBiasEffectiveStart,
    _Out_opt_ PLARGE_INTEGER TimeZoneBiasEffectiveEnd
    );

#endif
#endif
View code on GitHub