Text aus einer HTML-Datei einlesen?

[Chrissi91]

Delphi-Quellcode:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    HTTPGet1: THTTPGet;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
const
  urlText: string = 'http://chrissi1991.ch.ohost.de/update.txt';

procedure TForm1.Button1Click(Sender: TObject);
var 
  s: TStream;
begin
  s := TMemoryStream.Create;
  try
    http.Get(urlText, s);
    s.Position := 0; 
    Memo1.Lines.LoadFromStream(s);
  finally
    s.Free;
 end;
end;
end.

Weiterhin: [Error] Unit1.pas(36): Undeclared identifier: 'http'