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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Edit1: TEdit;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure ServerClientRead(Sender: TObject; Socket: TCustomWinSocket);
    procedure ClientConnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure ClientDisconnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
    Server: TServerSocket;
    Client: TClientSocket;
implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  Server:=TServerSocket.Create(Form1);
  Client:= TClientSocket.Create(Form1);

  Server.Port:=44044;
  Client.Port:=44044;
  Client.Host:='127.0.0.1'; //Localhost
  Server.Open;
  Client.Open;

end;

procedure TForm1.Button2Click(Sender: TObject);
begin

  Client.Close;
  Server.Close;

end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  if Client.Active = true then  Client.Socket.SendText(Edit1.Text);

  Edit1.Text:='';

end;

procedure TForm1.ServerClientRead(Sender: TObject; Socket: TCustomWinSocket);
begin

  Memo1.Lines.Add(Socket.ReceiveText);

end;

procedure TForm1.ClientConnect(Sender: TObject; Socket: TCustomWinSocket);
begin

  Memo1.Lines.Add('***Connected.')

end;

procedure TForm1.ClientDisconnect(Sender: TObject;
  Socket: TCustomWinSocket);
begin

  Memo1.Lines.Add('***Disconnected.');

end;

procedure TForm1.FormCreate(Sender: TObject);
begin
//    Server.OnClientRead := ServerClientRead;
end;

end.