unit1.pas

sample how to use TClientSocket & TServerSocket

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    cs: TClientSocket;
    GroupBox1: TGroupBox;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Edit2: TEdit;
    Button4: TButton;
    GroupBox2: TGroupBox;
    Edit3: TEdit;
    Button2: TButton;
    Button3: TButton;
    Button1: TButton;
    procedure Button4Click(Sender: TObject);
    procedure csError(Sender: TObject; Socket: TCustomWinSocket;
      ErrorEvent: TErrorEvent; var ErrorCode: Integer);
    procedure csConnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure csDisconnect(Sender: TObject; Socket: TCustomWinSocket);
  private
    { Private declarations }
    isConnectedServer : boolean;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button4Click(Sender: TObject);
begin
  cs.Host := edit1.text;
  cs.port := strToInt(edit2.text);

  try
    cs.Active           := true;
    Button4.Enabled     := false;
    isConnectedServer   := true;
  except
    cs.Active           := false;
    Button4.Enabled     := true;
    isConnectedServer   := false;
  end;
end;

procedure TForm1.csError(Sender: TObject; Socket: TCustomWinSocket;
  ErrorEvent: TErrorEvent; var ErrorCode: Integer);
begin
  showmessage('error connect ke server !!');

  cs.Active           := false;
  Button4.Enabled     := true;
  isConnectedServer   := false;

  ErrorCode := 0;     //penting !! 0-->biar pesan error socket tidak dimunculkan
end;

procedure TForm1.csConnect(Sender: TObject; Socket: TCustomWinSocket);
begin
  showmessage('conect sukses');
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if isConnectedServer then
    cs.Socket.SendText('NTP')
  else
    showmessage('ora konect ke server !!')
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  if isConnectedServer then
    cs.Socket.SendText('MSG ' + edit3.text)
  else
    showmessage('ora konect ke server !!')
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  if isConnectedServer then
    cs.Socket.SendText('CLS')
  else
    showmessage('ora konect ke server !!')
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  isConnectedServer := false;
end;

procedure TForm1.csDisconnect(Sender: TObject; Socket: TCustomWinSocket);
begin
  cs.Active           := false;
  Button4.Enabled     := true;
  isConnectedServer   := false;

  showmessage('server gak aktif !!');
end;

end.