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void __fastcall TForm1::BnOKClick(TObject *Sender)
{
  OSVERSIONINFO ovi;
  ovi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
  if(GetVersionEx(&ovi))
   {
     if(ovi.dwPlatformId == VER_PLATFORM_WIN32_NT)
      {
        HANDLE hToken;
        TOKEN_PRIVILEGES tkp;
        if(OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &hToken))
         {
           LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &tkp.Privileges[0].Luid);
           tkp.PrivilegeCount = 1;
           tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
           AdjustTokenPrivileges(hToken, false, &tkp, 0, NULL, 0);
         }
      }
   }
  unsigned int m = EWX_SHUTDOWN;
  if(RbPowerOff->Checked) //选择了关机
    m|=EWX_POWEROFF;
  else if(RbReboot->Checked) //选择了重新启动
    m|=EWX_REBOOT;
  else if(RbLogoff->Checked) //选择了注销
    m|=EWX_LOGOFF;
  ExitWindowsEx(m,0); //执行选择的命令
  Close();
}

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