Sounds like you'll have to roll your own GetTimeZoneBias function that takes a date as an input parameter. Maybe you can find some source code on the web.
Dave --- On Tue, 10/27/09, mauro russo <[email protected]> wrote: From: mauro russo <[email protected]> Subject: [delphi-en] conversions between UTC and local time To: "delphi-en" <[email protected]> Date: Tuesday, October 27, 2009, 2:48 AM Dear all, I am using the following function in order to obtain the bias between local time and UTC: function GetTimeZoneBias_min(): Integer; var tz: TTimeZoneInformation; begin case GetTimeZoneInformation(tz) of TIME_ZONE_ID_STANDARD: Result := -(tz.StandardBias + tz.Bias); TIME_ZONE_ID_DAYLIGHT: Result := -(tz.DaylightBias + tz.Bias); else Result := 0; end; end; and I use the result Res in the formula: locla_time = UTC + Res. Now, I would like to obtain the bias not at the current time, but according to a given UTC value. For example, now UTC is 9:47 at the 27th of october, but how to obtain the bias when UTC was, for example, 8:35 at the 5th of july? How to do it? Regards and thanks for help. ---------- Questa email è stata verificata dal sistema centralizzato antivirus della UniPlan Software [Non-text portions of this message have been removed] ------------------------------------ ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [email protected]! Groups Links [Non-text portions of this message have been removed]
