Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

uses comobj;


 procedure OpenIE(aURL: string);
 var
   IE:        Variant;
   WinHanlde: HWnd;
 begin
   if (VarIsEmpty(IE)) then
   begin
     IE         := CreateOleObject('InternetExplorer.Application');
     IE.Visible := True;
     IE.Navigate(aURL);
   end
   else
   begin
     WinHanlde := FindWindow('IEFrame', nil);
     if (0 <> WinHanlde) then
     begin
       IE.Navigate(aURL);
       SetForegroundWindow(WinHanlde);
     end
     else
       ShowMessage('Can''t open IE !');
   end;
 end;


 procedure TForm1.Button1Click(Sender: TObject);
 begin
   OpenIE('http://www.swissdelphicenter.ch');
 end;