Converting Server to Local Time

[pduncan]

Hi all,

I need to update client machines with the correct time if it is
inaccurate. The server I'm using will always have the correct time so
I'll be using that as the source of correct time. The code below works
most of the time but is an an hour off sometimes (daylightsavings
time).

For example, If I change the date on a local to machine to Jan 2005, my
code will update the time an hour ahead of where it should be. Any
help would be appreciated.

Thanks,Paul

Code is below

using System;
using System.Runtime.InteropServices;

public void UpdateTime(DateTime ServerTime)
{
TimeZone localZone = TimeZone.CurrentTimeZone;
DateTime localTime = localZone.ToLocalTime(ServerTime);
TimeSpan localOffset = localZone.GetUtcOffset(localTime );
ServerTime = ServerTime.Add(localOffset);
SetTime(ServerTime);
}

[StructLayoutAttribute(LayoutKind.Sequential)]
private struct SYSTEMTIME
{
public short year;
public short month;
public short dayOfWeek;
public short day;
public short hour;
public short minute;
public short second;
public short milliseconds;
}

[DllImport("kernel32.dll")]
static extern bool SetLocalTime(ref SYSTEMTIME time);

private void SetTime(DateTime NewTime)
{
SYSTEMTIME st;
st.year = (short)NewTime.Year;
st.month = (short)NewTime.Month;
st.dayOfWeek = (short)NewTime.DayOfWeek;
st.day = (short)NewTime.Day;
st.hour = (short)NewTime.Hour;
st.minute = (short)NewTime.Minute;
st.second = (short)NewTime.Second;
st.milliseconds = (short)NewTime.Millisecond;
SetLocalTime(ref st);
}