GetTimeZoneInformation function (timezoneapi.h)
Retrieves the current time zone settings. These settings control the translations between Coordinated Universal Time (UTC) and local time.
DWORD GetTimeZoneInformation( [out] LPTIME_ZONE_INFORMATION lpTimeZoneInformation );
A pointer to a TIME_ZONE_INFORMATION structure to receive the current settings.
If the function succeeds, it returns one of the following values.
||Daylight saving time is not used in the current time zone, because there are no transition dates or automatic adjustment for daylight saving time is disabled.|
||The system is operating in the range covered by the StandardDate member of the TIME_ZONE_INFORMATION structure.|
||The system is operating in the range covered by the DaylightDate member of the TIME_ZONE_INFORMATION structure.|
If the function fails for other reasons, such as an out of memory error, it returns TIME_ZONE_ID_INVALID. To get extended error information, call GetLastError.
All translations between UTC time and local time are based on the following formula:
UTC = local time + bias
The bias is the difference, in minutes, between UTC time and local time.
The StandardName and DaylightName members of the resultant TIME_ZONE_INFORMATION structure are localized according to the current user default UI language.
For an example, see SetTimeZoneInformation.
|Minimum supported client||Windows 2000 Professional [desktop apps | UWP apps]|
|Minimum supported server||Windows 2000 Server [desktop apps | UWP apps]|
|Header||timezoneapi.h (include Windows.h)|