int off = hw_GetTimeZone(int *isdst, struct hwTagList *tags);
offwill be set to the number of minutes of this computer's time from UTC and
isdstwill be a boolean value that specifies whether or not daylight saving time is currently active in the host system's time zone. If you don't need daylight saving information, pass
off will be negative if the host system is east of UTC
and positive if it is west of UTC.
This function is thread-safe.
intreceiving the flag whether or not daylight saving time is active; this can be