procedure TForm1.RebootSystem;
var
  osVerInfo: TOSVersionInfo;
  rl: Cardinal;
  hToken: Cardinal;
  tkp: TOKEN_PRIVILEGES;
begin
  if OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES or
    TOKEN_QUERY, hToken) then
  begin
    osVerInfo.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);
    if GetVersionEx(osVerInfo) then
      case osVerInfo.dwPlatformId of
        VER_PLATFORM_WIN32_NT: // Windows NT/2000/XP
          begin
            OpenProcessToken(GetCurrentProcess, TOKEN_ADJUST_PRIVILEGES or
              TOKEN_QUERY, hToken);
            if LookupPrivilegeValue(nil, 'SeShutdownPrivilege',
              tkp.Privileges[0].Luid) then
            begin
              tkp.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
              tkp.PrivilegeCount := 1;
              AdjustTokenPrivileges(hToken, False, tkp, 0, nil, rl);
            end;
            // ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE + EWX_POWEROFF, 0);   //关闭计算机
            ExitWindowsEx(EWX_REBOOT, $FFFF); // 重启
          end;
        VER_PLATFORM_WIN32_WINDOWS: // Windows 95/98/98SE/Me
          begin
            // ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE + EWX_POWEROFF, 0);   //关闭计算机
            ExitWindowsEx(EWX_REBOOT, $FFFF); // 重启
 
          end;
      end;
  end;
end;
 
调用 ：
procedure TForm1.X1Click(Sender: TObject);
begin
  if MessageBox(0, '你要重启计算机吗？', '警告', MB_ICONQUESTION or MB_YESNO) = idyes then
  begin
    RebootSystem;
  end;
  application.Terminate;
end;
//delphi/6751