...append HTML Text to a TWebbrowser Document?

http://www.swissdelphicenter.ch/en/showcode.php?id=2148

{1. ----------------------------------------------------------------}

uses
MSHTML;

procedure TForm1.Button1Click(Sender: TObject);
var
Range: IHTMLTxtRange;
begin
Range := ((WebBrowser1.Document as IHTMLDocument2).body as
IHTMLBodyElement).createTextRange;
Range.collapse(False);
Range.pasteHTML('<br><b>Hello!</b>');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Webbrowser1.Navigate('www.google.ch');
end;

{----------------------------------------------------------------}

{2. ----------------------------------------------------------------}

unit Unit1;
// by Sprint

interface

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

type
TForm1 = class(TForm)
WebBrowser1: TWebBrowser;
procedure FormCreate(Sender: TObject);
procedure WebBrowser1DocumentComplete(Sender: TObject;
const pDisp: IDispatch; var URL: OleVariant);
private
{ Private-Deklarationen }
FirstRun: Boolean;
public
{ Public-Deklarationen }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}
{----------------------------------------------------------------}

procedure TForm1.FormCreate(Sender: TObject);
begin
FirstRun := True;
WebBrowser1.Navigate('about:blank');
end;

{----------------------------------------------------------------}

procedure TForm1.WebBrowser1DocumentComplete(Sender: TObject;
const pDisp: IDispatch; var URL: OleVariant);
var
WebDoc: HTMLDocument;
WebBody: HTMLBody;
begin
if FirstRun then
if pDisp = WebBrowser1.Application then
begin
FirstRun := False;
WebDoc := WebBrowser1.Document as HTMLDocument;
WebBody := WebDoc.body as HTMLBody;
WebBody.insertAdjacentHTML('BeforeEnd', '<h1>Hello World!</h1>');
end;
end;

{----------------------------------------------------------------}

end.