Abweichung von UTC bekommen

[shmia]

Delphi-Quellcode:

// liefert den Abstand der lokalen Zeit zu UTC
// UTC = lokaleZeit + GetTimeZoneBias
function GetTimeZoneBias:TDateTime;
const
   MINUTES_PER_DAY = 24.0 * 60.0;
var
  tzi : TTimeZoneInformation;
begin
   case GetTimeZoneInformation(tzi) of
      TIME_ZONE_ID_STANDARD:
         result := (tzi.Bias) / MINUTES_PER_DAY;

      TIME_ZONE_ID_DAYLIGHT:  // Sommerzeit
         Result := (tzi.Bias+tzi.DaylightBias) / MINUTES_PER_DAY;
   else
      Result := 0.0;
   end;
end;