以C＃獲取並設置系統時間

我從網絡論壇發現了一個示例代碼。當我開始學習它。我發現輸出很奇怪。以C＃獲取並設置系統時間

爲什麼代碼不能正常工作？

當我運行下面的代碼時，它總是向前走8小時。

使用VS2005和WinXP。謝謝。

class Tester 
    { 
     [System.Runtime.InteropServices.DllImport("kernel32", SetLastError = 
     true)] 
     private static extern bool GetSystemTime(out SYSTEMTIME systemTime); 
     [System.Runtime.InteropServices.DllImport("kernel32", SetLastError = 
     true)] 
     private static extern bool SetSystemTime(ref SYSTEMTIME systemTime); 
     struct SYSTEMTIME 
     { 
      internal short wYear; 
      internal short wMonth; 
      internal short wDayOfWeek; 
      internal short wDay; 
      internal short wHour; 
      internal short wMinute; 
      internal short wSecond; 
      internal short wMilliseconds; 
     } 
     static void Main() 
     { 
      SYSTEMTIME st; 
      if (GetSystemTime(out st)) 
      { 
       st.wHour = 2; // new system time was set to nearby 10:00 AM, 2 + 8 
       // If i replace the line with below one. 
       // st.wHour = 18; // new system time was set to nearby 2:00 AM next day, 18 + 8 = 26, 26 - 24. go to next day! 
       if (SetSystemTime(ref st)) 
        Console.WriteLine("success"); 
       else 
        Console.WriteLine(System.Runtime.InteropServices.Marshal.GetLastWin32Error()); 
      } 
      else 
       Console.WriteLine("GetSystemTime failed: {0}", 
       System.Runtime.InteropServices.Marshal.GetLastWin32Error()); 
     } 
    }

來源

2010-06-29 Nano HE