At 04:38 7/24/2003, Rob Arends wrote:
>But how do you determine WHEN to apply the daylight offset and WHAT is the
>offset?
// TSInfo.cpp : Defines the entry point for the console application.
//
#include <stdio.h>
#include <windows.h>
// there's probably a better way to handle this part
// but I was in a hurry and didn't look for it...:)
LPTSTR ordinals[] = {"",
"first",
"second",
"third",
"fourth",
"fifth"};
LPTSTR weekdays[] = {"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"};
LPTSTR months[] = { "January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"};
int main(int argc, char* argv[])
{
TIME_ZONE_INFORMATION tz;
DWORD status;
status = GetTimeZoneInformation(&tz);
switch (status)
{
case TIME_ZONE_ID_INVALID:
{
DWORD count;
LPTSTR buffer;
count = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_IGNORE_INSERTS,
0,
GetLastError(),
0,
buffer,
0,
0);
printf("%s\r\n", buffer);
LocalFree((HLOCAL)buffer);
break;
}
case TIME_ZONE_ID_UNKNOWN:
{
printf("Unknown time zone information\r\n");
break;
}
default:
{
if (status == TIME_ZONE_ID_STANDARD)
printf("Currently in Standard time\r\n");
else if (status == TIME_ZONE_ID_DAYLIGHT)
printf("Currently in Daylight time\r\n");
else
printf("Unable to determine Standard or
Daylight");
printf("Your current offset from GMT is %i
minutes\r\n",
tz.Bias);
printf("Standard Time in your time zone is called
%S\r\n",
(LPWSTR)tz.StandardName);
if (tz.StandardDate.wYear == 0)
printf("Standard Time starts on the %s %s
in %s\r\n",
ordinals[tz.StandardDate.wDay],
weekdays[tz.StandardDate.wDayOfWeek],
months[tz.StandardDate.wMonth]);
else
printf("Standard Time starts on %s, %n %s
%n\r\n",
weekdays[tz.StandardDate.wDayOfWeek],
tz.StandardDate.wDay,
months[tz.StandardDate.wMonth],
tz.StandardDate.wYear);
printf("Standard Time bias is %i minutes\r\n",
tz.StandardBias);
printf("Daylight Time in your time zone is called
%S\r\n",
(LPWSTR)tz.DaylightName);
if (tz.DaylightDate.wYear == 0)
printf("Daylight Time starts on the %s %s
in %s\r\n",
ordinals[tz.DaylightDate.wDay],
weekdays[tz.DaylightDate.wDayOfWeek],
months[tz.DaylightDate.wMonth]);
else
printf("Standard Time starts on %s, %n %s
%n\r\n",
weekdays[tz.DaylightDate.wDayOfWeek],
tz.DaylightDate.wDay,
months[tz.DaylightDate.wMonth],
tz.DaylightDate.wYear);
printf("Daylight Time bias is %i minutes\r\n",
tz.DaylightBias);
}
}
return 0;
}
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