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unit UPing;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdIcmpClient, Spin, StdCtrls, ScktComp, ExtCtrls, Buttons;

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    SpinEdit1: TSpinEdit;
    SpinEdit2: TSpinEdit;
    Label3: TLabel;
    Timer1: TTimer;
    SpinEdit3: TSpinEdit;
    Label4: TLabel;
    SpeedButton1: TSpeedButton;
    procedure Timer1Timer(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure SpinEdit3Change(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
    procedure Edit1Change(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
  mPing: TIdIcmpClient;

implementation

{$R *.dfm}

procedure TForm1.Timer1Timer(Sender: TObject);
begin
  try
    mPing.ReceiveTimeout := SpinEdit2.Value;
    mPing.Host := Edit1.Text;
    mPing.Port:= SpinEdit1.Value;
    mPing.Ping;
    Memo1.Lines.Add('Received from Host: '+mPing.ReplyStatus.FromIpAddress+' Bytes: '+inttostr(mPing.ReplyStatus.BytesReceived));
  except
    on E: Exception do begin
      Memo1.Lines.Add('Host not received');
    end;
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  mPing:=TIdIcmpClient.Create(self);
end;

procedure TForm1.SpinEdit3Change(Sender: TObject);
begin
  Timer1.Interval:=SpinEdit3.Value;
end;

procedure TForm1.SpeedButton1Click(Sender: TObject);
begin
  Timer1.Enabled:=not Timer1.Enabled;
  SpeedButton1.Down:=Timer1.Enabled;
end;

procedure TForm1.Edit1Change(Sender: TObject);
begin
  Timer1.Enabled:=false;
  SpeedButton1.Down:=false;
end;

end.					

1:

[Fataler Fehler] ...: Datei nicht gefunden: 'IdIcmpClient.dcu'