Pegar fonte html tudo bem, mas de um frame? como ajeita esse

unit Unit1; 

interface 

uses 
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
  Dialogs, activex, OleCtrls, SHDocVw, StdCtrls; 

type 
  TForm1 = class(TForm) 
    Button1: TButton; 
    Button2: TButton; 
    WebBrowser1: TWebBrowser; 
    procedure Button1Click(Sender: TObject); 
    procedure Button2Click(Sender: TObject); 
function GetFrame(FrameNo: Integer): IWebbrowser2; 
  private 
    { Private declarations } 
  public 
    { Public declarations } 
  end; 

var 
  Form1: TForm1; 

implementation 

{$R *.dfm} 

function TForm1.GetFrame(FrameNo: Integer): IWebbrowser2; 
var 
  OleContainer: IOleContainer; 
  enum: IEnumUnknown; 
  unk: IUnknown; 
  Fetched: PLongint; 
begin 
  while Webbrowser1.ReadyState <> READYSTATE_COMPLETE do 
    Application.ProcessMessages; 
  if Assigned(Webbrowser1.document) then 
  begin 
    Fetched := nil; 
    OleContainer := Webbrowser1.Document as IOleContainer; 
    OleContainer.EnumObjects(OLECONTF_EMBEDDINGS, Enum); 
    Enum.Skip(FrameNo); 
    Enum.Next(1, Unk, Fetched); 
    Result := Unk as IWebbrowser2; 
  end 
  else 
    Result := nil; 
end; 

// Load sample page 
// Testseite laden 
procedure TForm1.Button1Click(Sender: TObject); 
begin 
  Webbrowser1.Navigate(´http://www.warebizprogramming.com/tutorials/html/framesEx1.htm´); 
end; 

// Save all frames in single files 
// Alle Frameseiten in einzelne Dateien speichern 
procedure TForm1.Button2Click(Sender: TObject); 
var 
  IpStream: IPersistStreamInit; 
  AStream: TMemoryStream; 
  iw: IWebbrowser2; 
  i: Integer; 
  sl: TStringList; 
begin 
  for i := 0 to Webbrowser1.OleObject.Document.frames.Length - 1 do 
  begin 
    iw := GetFrame(i); 
    AStream := TMemoryStream.Create; 
    try 
      IpStream := iw.document as IPersistStreamInit; 
      if Succeeded(IpStream.save(TStreamadapter.Create(AStream), True)) then 
      begin 
        AStream.Seek(0, 0); 
        sl := TStringList.Create; 
        sl.LoadFromStream(AStream); 
        sl.SaveToFile(´c:\frame´ + IntToStr(i) + ´.txt´); 
        //  memo1.Lines.LoadFromStream(AStream); 
        sl.Free; 
      end; 
    except 
    end; 
    AStream.Free; 
  end; 
end; 
end.