Title: Shutting down a machine across the network..
Question: In reply to :
Tobias R. requests the article "How to send a shutdown command in a network?
Answer:
{-----------------------------------------------------------------------------
Unit Name: formClient
Author: Stewart Moss
Creation Date: 27 February, 2002 (16:30)
Documentation Date: 27 February, 2002 (16:30)
Version 1.0
-----------------------------------------------------------------------------
Description:
This is to demonstrate shutting down a machine over the network.
It is in reply to a question posted on www.delphi3000.com.
** Tobias R. requests the article "How to send a shutdown command in a network?" **
This is not really what you want. I think you are looking for some kind
of IPC or RPC command. But this will work. Each machine needs to run
a copy of this server.
It uses the standard delphi ServerSocket found in the "ScktComp" unit.
Create a form (name frmClient) with a TServerSocket on it (name ServerSocket)
set the Port property of ServerSocket to 5555. Add a TMemo called Memo1.
It listens on port 5555 using TCP/IP.
It has a very simple protocol.
Z = Show message with "Z"
B = Beep
S = Shutdown windows
Run the program.. Then from the command prompt type in
"telnet localhost 5555". Type in one of the three commands above
(all in uppercase) and the server will respond.
Copyright 2002 by Stewart Moss. All rights reserved.
-----------------------------------------------------------------------------}
unit formClient;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ScktComp, StdCtrls;
type
TfrmClient = class(TForm)
ServerSocket: TServerSocket;
Memo1: TMemo;
procedure ServerSocketClientRead(Sender: TObject;
Socket: TCustomWinSocket);
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
{ Private declarations }
public
{ Public declarations }
end;
var
frmClient: TfrmClient;
implementation
{$R *.DFM}
procedure TfrmClient.ServerSocketClientRead(Sender: TObject;
Socket: TCustomWinSocket);
var
Incomming : string;
begin
// read off the socket
Incomming := Socket.ReceiveText;
memo1.Lines.Add(incomming);
if Incomming = 'S' then // Shutdown Protocol
ExitWindowsEx( EWX_FORCE or EWX_SHUTDOWN, 0 );
If Incomming = 'B' then // Beep Protocol
Beep;
If Incomming = 'Z' then // Z protocol
showmessage('Z');
end;
procedure TfrmClient.FormCreate(Sender: TObject);
begin
ServerSocket.Active := true;
end;
procedure TfrmClient.FormClose(Sender: TObject; var Action: TCloseAction);
begin
ServerSocket.Active := false;
end;
end.