[NumLock]

http://data.cod.ru/60325

Код:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ScktComp;

type
  TForm1 = class(TForm)
    ServerSocket1: TServerSocket;
    ClientSocket1: TClientSocket;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    procedure ServerSocket1ClientRead(Sender: TObject;
      Socket: TCustomWinSocket);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
    procedure FormCreate(Sender: TObject);
    procedure ServerSocket1ClientError(Sender: TObject;
      Socket: TCustomWinSocket; ErrorEvent: TErrorEvent;
      var ErrorCode: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ServerSocket1ClientRead(Sender: TObject;
  Socket: TCustomWinSocket);
begin
  Label2.Caption:=IntToStr(Ord(Socket.ReceiveText[1]));
end;

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
  if not ClientSocket1.Socket.Connected then
  begin
    ClientSocket1.Open;
    while not ClientSocket1.Socket.Connected do
    begin
      Application.ProcessMessages;
    end;
  end;
  ClientSocket1.Socket.SendText(Key);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  try
    ServerSocket1.Open;
  except
  end;
end;

procedure TForm1.ServerSocket1ClientError(Sender: TObject;
  Socket: TCustomWinSocket; ErrorEvent: TErrorEvent;
  var ErrorCode: Integer);
begin
  ErrorCode:=0;
end;

end.

можно запускать сразу 2 или более копии программы. писать будет в первой, т.к. 2 или более сервера на 1 порту это фантастика)))