TIME_ZONE_INFORMATION - Win32 Programmer's Reference

Win32 Programmer's Reference

Home Index About

Custom Search

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
No
Import Library
-
Header File
winbase.h
Unicode
No
Platform Notes
None

TIME_ZONE_INFORMATION

The TIME_ZONE_INFORMATION structure specifies information specific to the time zone.

typedef struct _TIME_ZONE_INFORMATION { // tzi

LONG Bias;

WCHAR StandardName[ 32 ];

SYSTEMTIME StandardDate;

LONG StandardBias;

WCHAR DaylightName[ 32 ];

SYSTEMTIME DaylightDate;

LONG DaylightBias;

} TIME_ZONE_INFORMATION;

Members
Bias

Specifies the current bias, in minutes, for local time translation on this computer. The bias is the difference, in minutes, between Coordinated Universal Time (UTC) and local time. All translations between UTC and local time are based on the following formula:

UTC = local time + bias

This member is required.

StandardName

Specifies a null-terminated string associated with standard time on this operating system. For example, this parameter could contain "EST" to indicate Eastern Standard Time. This string is not used by the operating system, so anything stored there by using the SetTimeZoneInformation function is returned unchanged by the GetTimeZoneInformation function. This string can be empty.

StandardDate

Specifies a SYSTEMTIME structure that contains a date and UTC when the transition from daylight time to standard time occurs on this operating system. If this date is not specified, the wMonth member in the SYSTEMTIME structure must be zero. If this date is specified, the DaylightDate value in the TIME_ZONE_INFORMATION structure must also be specified. Local time translations done during the standard-time range are relative to the supplied StandardBias value.

This member supports two date formats. Absolute format specifies an exact date and time when standard time begins. In this form, the wYear, wMonth, wDay, wHour, wMinute, wSecond, and wMilliseconds members of the SYSTEMTIME structure are used to specify an exact date.

Day-in-month format is specified by setting the wYear member to zero, setting the wDayOfWeek member to an appropriate weekday, and using a wDay value in the range 1 through 5 to select the correct day in the month. Using this notation, the first Sunday in April can be specified, as can the last Thursday in October (5 is equal to "the last").

StandardBias

Specifies a bias value to be used during local time translations that occur during standard time. This member is ignored if a value for the StandardDate member is not supplied.

This value is added to the value of the Bias member to form the bias used during standard time. In most time zones, the value of this member is zero.

DaylightName

Specifies a null-terminated string associated with daylight time on this operating system. For example, this parameter could contain "PDT" to indicate Pacific Daylight Time. This string is not used by the operating system, so anything stored there by using the SetTimeZoneInformation function is returned unchanged by the GetTimeZoneInformation function. This string can be empty.

DaylightDate

Specifies a SYSTEMTIME structure that contains a date and UTC when the transition from standard time to daylight time occurs on this operating system. If this date is not specified, the wMonth member in the SYSTEMTIME structure must be zero. If this date is specified, the StandardDate value in the TIME_ZONE_INFORMATION structure must also be specified. Local time translations during the daylight-time range are relative to the supplied DaylightBias value. This member supports the absolute and day-in-month time formats described for the StandardDate member.

DaylightBias

Specifies a bias value to be used during local time translations that occur during daylight time. This member is ignored if a value for the DaylightDate member is not supplied.

This value is added to the value of the Bias member to form the bias used during daylight time. In most time zones, the value of this member is

60.

See Also
GetTimeZoneInformation, SetTimeZoneInformation, SYSTEMTIME

Last news from Greatis Software

    Nostalgia .Net     .Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More »

Recommended software for developers

    Ultimate Pack     Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More »

    Form Designer .Net     Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More »

    Print Suite .Net     Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More »

    Gradient Controls .Net     Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More »

    Greatis iGrid     iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More »

All the contacts and projects

Dmitry Vasiliev (just.dmitry)

More Online Helps

Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages

greatis just4fun network