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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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GetTimeZoneInformation
The GetTimeZoneInformation function retrieves the current time-zone parameters. These parameters control
the translations between Coordinated Universal Time (UTC) and local time.
DWORD GetTimeZoneInformation(
LPTIME_ZONE_INFORMATION lpTimeZoneInformation
| // address of time-zone settings
| );
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Parameters
lpTimeZoneInformation
Points to a TIME_ZONE_INFORMATION structure to receive the current time-zone parameters.
Return Values
If the function succeeds, the return value is one of the following values:
Value
| Meaning
| TIME_ZONE_ID_UNKNOWN
| The operating system cannot determine the current time zone. This is usually
because a previous call to the SetTimeZoneInformation function supplied only the bias (and no transition dates).
| TIME_ZONE_ID_STANDARD
| The operating system is operating in the range covered by the StandardDate member of the structure pointed to by the lpTimeZoneInformation parameter.
| TIME_ZONE_ID_DAYLIGHT
| The operating system is operating in the range covered by the DaylightDate member of the structure pointed to by the lpTimeZoneInformation parameter.
|
If the function fails, the return value is 0xFFFFFFFF. To get extended error
information, call GetLastError.
Remarks
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.
See Also
SetTimeZoneInformation, TIME_ZONE_INFORMATION
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