众所周知，在9x下关机只要ExitWindows(0,0)就行了，可是在NT/2000下这个函数
的执行结果仅是注销而已，那么如何在NT/2000下实现关机呢？看看下面这个函数吧！

void ShutDown(void)
{
 OSVERSIONINFO osv;
 osv.dwOSVersionInfoSize=sizeof OSVERSIONINFO;
 GetVersionEx(&osv);
 if(osv.dwPlatformId==VER_PLATFORM_WIN32_NT)
 {
  HANDLE hProcess,hToken;
  TOKEN_PRIVILEGES Privileges;
  LUID luid;
  hProcess=GetCurrentProcess();
  OpenProcessToken(hProcess,TOKEN_ADJUST_PRIVILEGES,&hToken);
  Privileges.PrivilegeCount=1;
  LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&luid);
  Privileges.Privileges[0].Luid=luid;
  Privileges.Privileges[0].Attributes=SE_PRIVILEGE_ENABLED;
  AdjustTokenPrivileges(hToken,FALSE,&Privileges,NULL,NULL,NULL);
 }
 ExitWindowsEx(EWX_POWEROFF,0);
}