SetDaylightState

SetDaylightState sets the current time zone to STANDARD time zone or DAYLIGHT time zone.

Syntax

BOOL  SetDaylightState(
    DST_STATE DstState    
 );

Parameters

DstState

A DST_STATE enumeration value that specifies whether the system is operating in the STANDARD time zone or DAYLIGHT time zone.

Return Value

If the function succeeds, it returns TRUE. If the function fails, it returns FALSE.

Remarks

If the function fails and GetLastError returns ERROR_NOT_SUPPORTED, the current time zone does not observe daylight-saving time. In this case, use the TimeZone environment variable in the RtKrnlConfig.ini file to change the time zone property.

Changing the daylight state will alter the translations between system time in Coordinated Universal Time (UTC) and local time, thereby affecting the returned time from GetLocalTime.

Requirements

See Also:

• GetDaylightState
• GetSystemTime
• GetSystemTimeAsFileTime
• GetTimeZoneInformation
• RtGetClockTime
• RtSetClockTime