uses
  ddeman;


function GetURL(Service: string): string;
var
  ClDDE: TDDEClientConv;
  temp: PChar;
begin
  Result := '';
  ClDDE := TDDEClientConv.Create(nil);
  with ClDDE do
  begin
    SetLink(Service, 'WWW_GetWindowInfo');
    temp := RequestData('0xFFFFFFFF');
    Result := StrPas(temp);
    StrDispose(temp);
    CloseLink;
  end;
  ClDDE.Free;
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage(GetURL('IExplore'));
  { ShowMessage(GetURL('Netscape')); }
end;