Solved

Get windows time zone

Posted on 1998-08-30
1
177 Views
Last Modified: 2010-04-16
How can I get the time zone set on a PC.
0
Comment
Question by:moonrise
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 8

Accepted Solution

by:
ZifNab earned 30 total points
ID: 1338140
hi moonrise :

>HKEYLocal Machine/Software/Microsoft/Windows/CurrentVersion/TimeZones/
>
>is the place where Timezone infos are stored in the registry. The
>binary 'TZI' entry should be the info for start and end times of
>daylight saving times. Anyone has an idea how to extract the dates
>from this value?
>

The TZI entry seems to be structured as follows:

int32 Bias;             // Minutes from GMT
                        // (Sydney -600; 0xfffffda8;
                        // or a8, fd, ff, ff)
int32 StandardBias;     // Bias for Standard time (0)
int32 DaylightBias;     // Bias for Daylight time (-60
                        // or 0xffffffc4 )
int16 ??                          // 0
int16 StandardStartMonth;         // 3 => March
int16 StandardStartDayOfWeek??;   // 0 => Sun
int16 StandardStartDOWoccurrence; // 1 => 1st
int16 StandardStartHour;          // 2 => 02:00:00.00
int16 StandardStartMins??;        // 0 => 02:00:00.00
int16 StandardStartSecs??;        // 0 => 02:00:00.00
int16 StandardStartHunds??;       // 0 => 02:00:00.00
int16 ??                          // 0
int16 DaylightStartMonth;         // 0x0a (10) => October
int16 DaylightStartDayOfWeek??;   // 0 => Sun
int16 DaylightStartDOWoccurrence; // 5 => last
int16 DaylightStartHour;          // 2 => 02:00:00.00
int16 DaylightStartMins??;        // 0 => 02:00:00.00
int16 DaylightStartSecs??;        // 0 => 02:00:00.00
int16 DaylightStartHunds??;       // 0 => 02:00:00.00

or use the GetTimeZoneInformation() Api.

The constants for the return values for the Windows API function GetTimeZoneInformation() are

const TIME_ZONE_ID_UNKNOWN  =  0;
const TIME_ZONE_ID_STANDARD =  1;
const TIME_ZONE_ID_DAYLIGHT =  2;


Regards, Zif.
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
drawing animated level bar based on numbers 3 118
LAN or WAN ? 11 116
Moving (cutting/pasting) controls in a TTabbedNotebook... 7 50
how to change, disabled button color FMX ? 1 59
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question