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unit Clientcompaq;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPServer;

type
  TForm1 = class(TForm)
    TCPServer: TIdTCPServer;
    Edit1: TEdit;
    Label1: TLabel;
    Button1: TButton;
    Button2: TButton;
    procedure FormCreate(Sender: TObject);
    procedure TCPServerExecute(AThread: TIdPeerThread);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
function BlockInput(fBlock:boolean):boolean; stdcall; external 'user32.dll';

procedure TForm1.FormCreate(Sender: TObject);
begin
TCPserver.active:=true;
end;

procedure TForm1.TCPServerExecute(AThread: TIdPeerThread);
var input,state : string;
begin
  with AThread.Connection do
  begin
    while Connected do begin
    input :=ReadLn;
    edit1.text := input;
    if input = 'Sperren' then begin
      blockinput(true);
      button1.Click;
      athread.Connection.WriteLn('Gesperrt');
      state := 'false';
    end;
 if input = 'Entsperren' then begin
    athread.Connection.WriteLn('Entsperrt');
    blockinput(false);
    button2.Click;
    state := 'true';
    end;
if input = 'Check' then athread.Connection.WriteLn('Bereit');
    Disconnect;
    end;
  end;

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
blockinput(true);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
blockinput(false);
end;

end.                    

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unit server;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection,
  IdTCPClient, ExtCtrls;

type
  TForm1 = class(TForm)
    IdTCPClient1: TIdTCPClient;
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Shape1: TShape;
    Timer1: TTimer;
    Button2: TButton;
    Button3: TButton;
    Edit3: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
idtcpclient1.Host:=edit2.text;
  with idTCPClient1 do
  begin
    try
    if not Connected then Connect;
    try
      WriteLN(Edit1.Text);
      edit3.Text := Readln;
    finally
       Disconnect;
    end;
    except
    showmessage ('Fehler beim verbinden zu '+ idTCPClient1.Host);
    end;
  end;
end;



procedure TForm1.Button2Click(Sender: TObject);
var status : string;
begin
idtcpclient1.Host:=edit2.text;
  with idTCPClient1 do
  begin
    try
    if not Connected then Connect;
    try
    WriteLN('Check');
    status:=idtcpclient1.ReadLn;
     if status = 'Gesperrt' then
      begin
       shape1.Brush.Color := cllime ;
       timer1.Enabled:=true;
      end;
     if status = 'Entsperrt' then
      begin
       shape1.Brush.Color := clred;
       timer1.Enabled:=true;
       end;
    finally
       Disconnect;
    end;
    except
    shape1.Brush.Color:=clred;
    timer1.Enabled:=false;
    showmessage ('Fehler beim verbinden zu '+ idTCPClient1.Host);
    end;
  end;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
var status : string;
begin
  with idTCPClient1 do
  begin
    try
    if not Connected then Connect;
    try
      WriteLN('Check');
    status:=idtcpclient1.ReadLn;
    if status = 'Gesperrt' then shape1.Brush.Color := cllime;
    if status = 'Entsperrt' then shape1.Brush.Color := clred;
    finally
       Disconnect;
    end;
    except
    timer1.Enabled:=false;
    shape1.Brush.Color:=clred;
    end;
  end;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
close;
end;

end.