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set the system time

Posted on 2004-11-25
Medium Priority
Last Modified: 2010-04-15
Is there a way to change the system time? Basically the system tray clock because when the application I have synchronizes with a time server, it needs to be able to set the system clock...
Question by:dotnet22
LVL 10

Assisted Solution

123654789987 earned 1000 total points
ID: 12678697
See the following link


It tells about using the SetSystemTime function in Kernel32.dll

Accepted Solution

Chester_M_Ragel earned 1000 total points
ID: 12678891
Here is a sample code,

using System;
using System.Runtime.InteropServices;

namespace MyBD
      struct SystemTime
            public short wYear;
            public short wMonth;
            public short wDayOfWeek;
            public short wDay;
            public short wHour;
            public short wMinute;
            public short wSecond;
            public short wMilliseconds;

      class SystemTimeSetter
            [DllImport("kernel32.dll", SetLastError=true)] static extern int SetSystemTime (ref SystemTime lpSystemTime);

            static void Main(string[] args)
                  SystemTime lpSystemTime;
                  lpSystemTime.wYear = 1979;
                  lpSystemTime.wMonth = 8;
                  lpSystemTime.wDayOfWeek = -1;
                  lpSystemTime.wDay = 3;
                  lpSystemTime.wHour = 0;
                  lpSystemTime.wMinute = 0;
                  lpSystemTime.wSecond = 0;
                  lpSystemTime.wMilliseconds = 0;
                  SetSystemTime(ref lpSystemTime);

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