我想通过编程实现修改windows的系统时间！复者百分哦！

using System;
using System.Runtime.InteropServices;namespace ConsoleApplication20
{
  [StructLayout(LayoutKind.Sequential)]
  public struct SYSTEMTIME
  {
    public ushort wYear;
    public ushort wMonth;
    public ushort wDayOfWeek;
    public ushort wDay;
    public ushort wHour;
    public ushort wMinute;
    public ushort wSecond;
    public ushort wMilliseconds;    public DateTime ToDateTime()
    {
      return new DateTime(wYear, wMonth, wDay, wHour, wMinute, wSecond,
wMilliseconds);
    }
  }  class Win32API
  {
    [DllImport("Kernel32.dll")]
    public static extern bool SetSystemTime(ref SYSTEMTIME st);
    [DllImport("Kernel32.dll")]
    public static extern void GetSystemTime(out SYSTEMTIME st);
  }  class Class1
  {
    [STAThread]
    static void Main(string[] args)
    {
      SYSTEMTIME st;
      Win32API.GetSystemTime(out st); // gets current time
      Console.WriteLine( st.ToDateTime().ToLocalTime().ToString() );
      st.wMinute++; // Adjust minutes
      if (!Win32API.SetSystemTime(ref st)) // sets system time
        Console.WriteLine("An error occured setting the system time");
      Win32API.GetSystemTime(out st); // gets current time
      Console.WriteLine( st.ToDateTime().ToLocalTime().ToString() );
      Console.ReadLine();
    }
  }
}