Как сделать так, чтобы работали команды Cut, Copy в WebBrowsere

initialization
  OleInitialize(nil);

finalization
  OleUninitialize;

...

var
  Form1: TForm1;
  FOleInPlaceActiveObject: IOleInPlaceActiveObject;
  SaveMessageHandler: TMessageEvent;

...

implementation

...

procedure TForm1.FormActivate(Sender: TObject);
begin
  SaveMessageHandler := Application.OnMessage;
  Application.OnMessage := MyMessageHandler;
end;

procedure TForm1.FormDeactivate(Sender: TObject);
begin
  Application.OnMessage := SaveMessageHandler;
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  Application.OnMessage := SaveMessageHandler;
  FOleInPlaceActiveObject := nil;
end;

procedure TForm1.MyMessageHandler(var Msg: TMsg; var Handled: Boolean);
var
  iOIPAO: IOleInPlaceActiveObject;
  Dispatch: IDispatch;
begin
  { exit if we don't get back a webbrowser object }
  if WebBrowser = nil then
  begin
    Handled := False;
    Exit;
  end;

  Handled:=(IsDialogMessage(WebBrowser.Handle, Msg) = True);

  if (Handled) and (not WebBrowser.Busy) then
  begin
    if FOleInPlaceActiveObject = nil then
    begin
      Dispatch := WebBrowser.Application;
      if Dispatch <> nil then
      begin
        Dispatch.QueryInterface(IOleInPlaceActiveObject, iOIPAO);
        if iOIPAO <> nil then
          FOleInPlaceActiveObject := iOIPAO;
      end;
    end;

    if FOleInPlaceActiveObject <> nil then
      if ((Msg.message = WM_KEYDOWN) or (Msg.message = WM_KEYUP)) and
         ((Msg.wParam = VK_BACK) or (Msg.wParam = VK_LEFT) or (Msg.wParam = VK_RIGHT)) then
        //nothing - do not pass on Backspace, Left or Right arrows
      else
        FOleInPlaceActiveObject.TranslateAccelerator(Msg);
  end;
end;