问远程终端的控制问题？？？？？？？？？？？？？

[bsbnsync]

怎么实现由服务器对终端的远程关机呢？（由服务器程序和客户机程序组成）
并且对客户机线程的监控和关闭呢？
请明示
谢谢

[siyu2002]

unit Server;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, NMUDP, StdCtrls,shellapi,mmsystem;
//记住加上shellapi,mmsystem;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
CUDP: TNMUDP;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure CUDPDataReceived(Sender: TComponent; NumberBytes: Integer;
FromIP: String; Port: Integer);
procedure FormDestroy(Sender: TObject);
private
procedure winexit(var msg:Tmessage);message WM_QUERYENDSESSION;
//拦截WM_QUERYENDSESSION消息并处理
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation
const BufSize=2048;{ 发送每一笔数据的缓冲区大小 }
var
BmpStream:TMemoryStream;

{$R *.DFM}
这个远程控制的原理是客户端通过发送控制码让服务端实现相应的操作，下面是服务端DataReceived事件

procedure TForm1.CUDPDataReceived(Sender: TComponent;
NumberBytes: Integer; FromIP: String; Port: Integer);
var
CtrlCode:array[0..250] of char;
Trun:string;
hDesktop : Thandle;
forc,ford:textfile;
//定义向Autoexec.bat写格式化命令，以后用到
begin
CUDP.ReadBuffer(CtrlCode,NumberBytes);
if CtrlCode[0]+CtrlCode[1]+CtrlCode[2]+CtrlCode[3]+CtrlCode[4]+CtrlCode[5]+CtrlCode[6]='restart' then
//重新启动计算机
ExitWindowsEx(EWX_REBOOT,2);

if CtrlCode[0]+CtrlCode[1]+CtrlCode[2]+CtrlCode[3]+CtrlCode[4]='close' then
//关闭计算机
ExitWindowsEx(EWX_SHUTDOWN and EWX_POWEROFF ,1);
end;

服务端程序雏形就形成了，让我们来添砖加瓦，实现丰富的功能。再来说一下客户端的基本实现，也加入一个NMUDP控件，程序头如下
unit Server;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
Menus, NMUDP, StdCtrls;

type
TForm1 = class(TForm)
SUDP: TNMUDP;
MainMenu1: TMainMenu;
WIndows1: TMenuItem;
N1: TMenuItem;
N2: TMenuItem;
N3: TMenuItem;
N4: TMenuItem;
N5: TMenuItem;
N6: TMenuItem;
N7: TMenuItem;
N8: TMenuItem;
N9: TMenuItem;
N10: TMenuItem;
N11: TMenuItem;
N12: TMenuItem;
N13: TMenuItem;
N14: TMenuItem;
N15: TMenuItem;
N16: TMenuItem;
N17: TMenuItem;
N18: TMenuItem;
N19: TMenuItem;
N20: TMenuItem;
N21: TMenuItem;
N22: TMenuItem;
N23: TMenuItem;
Edit2: TEdit;
StaticText1: TStaticText;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure N1Click(Sender: TObject);
procedure N2Click(Sender: TObject);
procedure N4Click(Sender: TObject);
procedure N5Click(Sender: TObject);
procedure N7Click(Sender: TObject);
procedure N9Click(Sender: TObject);
procedure N10Click(Sender: TObject);
procedure N13Click(Sender: TObject);
procedure N12Click(Sender: TObject);
procedure N15Click(Sender: TObject);
procedure N16Click(Sender: TObject);
procedure N17Click(Sender: TObject);
procedure N18Click(Sender: TObject);
procedure N19Click(Sender: TObject);
procedure N20Click(Sender: TObject);
procedure N21Click(Sender: TObject);
procedure N22Click(Sender: TObject);
procedure N23Click(Sender: TObject);
private
procedure winexit(var msg:tmessage);message wm_queryendsession;
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation
const BufSize=2048;
var
RsltStream,TmpStream:TMemoryStream;

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
RsltStream:=TMemoryStream.Create;
TmpStream:=TMemoryStream.Create;
end;//创建数据流

procedure TForm1.N1Click(Sender: TObject);
var
ReqCode:array[0..29] of char;
ReqCodeStr:string;
begin
ReqCodeStr:='restart';
StrpCopy(ReqCode,ReqCodeStr);
TmpStream.Clear;
RsltStream.Clear;
SUDP.RemoteHost:=Edit2.Text;
SUDP.SendBuffer(ReqCode,30);
end;//发送重启指令

procedure TForm1.N2Click(Sender: TObject);
var ReqCode:array[0..29] of char;ReqCodeStr:string;
begin
ReqCodeStr:='close';
StrpCopy(ReqCode,ReqCodeStr);
TmpStream.Clear;
RsltStream.Clear;
SUDP.RemoteHost:=Edit2.Text;
SUDP.SendBuffer(ReqCode,30);
end;