VOID
ExLocalTimeToSystemTime(
IN PLARGE_INTEGER LocalTime,
OUT PLARGE_INTEGER SystemTime
);
ExLocalTimeToSystemTime converts a system time value for the current time zone to an unbiased, GMT value.
ExLocalTimeToSystemTime adds the time-zone bias at the current locale to compute the corresponding GMT system time value.
Callers of ExLocalTimeToSystemTime can be running at any IRQL.