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function GetHTMLCode(WB: IWebbrowser2; ACode: TStrings): Boolean;  
var
 ps: IPersistStreamInit;
 s: string;
 ss: TStringStream;
 sa: IStream;
begin
 ps := WB.document as IPersistStreamInit;
 s := '';
 ss := TStringStream.Create(s);
 try
   sa:= TStreamAdapter.Create(ss, soReference) as IStream;
   Result := Succeeded(ps.Save(sa, Bool(True)));
   if Result then ACode.Add(ss.Datastring);
    end;
 finally
   ss.Free;
 end;
end;					

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdBaseComponent, IdComponent, IdCustomTCPServer, IdTCPServer,
  IdCmdTCPServer, IdHTTPProxyServer;

type
  TForm1 = class(TForm)
    IdHTTPProxyServer1: TIdHTTPProxyServer;
    procedure IdHTTPProxyServer1Connect(AContext: TIdContext);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.IdHTTPProxyServer1Connect(AContext: TIdContext);
begin
 showmessage ('connected')
end;

end.