uses mshtml, activex;
procedure GetHtmlCode(WebBrowser: TWebBrowser; FileName: string);
var
 htmlDoc: IHtmlDocument2;
 PersistFile: IPersistFile;
begin
 htmlDoc := WebBrowser.document as IHtmlDocument2;
 PersistFile := HTMLDoc as IPersistFile;
 PersistFile.save(StringToOleStr(FileName), true);
end;

var

 Document: IHTMLDocument2;

begin

 Document := WB.Document as IHtmlDocument2;

 if Document < > nil then

  Memo1.Text := (Document.all.Item(NULL, 0) as IHTMLElement).OuterHTML;