✔ Shell in Shell ohne Inhalt....

private void doLogin(Shell parentShell){
		//shell anlegen
		final Shell loginSh = new Shell(parentShell, SWT.APPLICATION_MODAL);
		
		//1.Reihe: Ueberschrift
		Label header = new Label(loginSh, SWT.CENTER);
		GridData headerGD = new GridData(GridData.HORIZONTAL_ALIGN_CENTER);
		headerGD.horizontalSpan = 2;
		header.setLayoutData(headerGD);
		header.setForeground(new Color(Display.getCurrent(), 18,34,234));
		header.setFont(new Font(Display.getCurrent(), "Arial", 12, 3));
		header.setText("JDCalendar - LOGIN");

		//2.Reihe: hor. Linie
		Label line = new Label(loginSh, SWT.SEPARATOR | SWT.HORIZONTAL | SWT.CENTER);
		GridData lineGD = new GridData(GridData.HORIZONTAL_ALIGN_CENTER);
		lineGD.horizontalSpan = 2;
		lineGD.widthHint = 190;
		line.setLayoutData(lineGD);

		//3.Reihe: Username + Textfeld
		Label username = new Label(loginSh, SWT.LEFT);
		username.setText("Username:");
		final Text usernameText = new Text(loginSh, SWT.LEFT | SWT.BORDER);
		GridData usernameTextGD = new GridData();
		usernameTextGD.widthHint = 100;
		usernameText.setLayoutData(usernameTextGD);
		usernameText.setFocus();

		//4.Reihe: Passwort + Textfeld
		Label password = new Label(loginSh, SWT.LEFT);
		password.setText("Passwort:");
		final Text passwordText = new Text(loginSh, SWT.NONE | SWT.BORDER);
		GridData passwordTextGD = new GridData();
		passwordTextGD.widthHint = 100;
		passwordText.setLayoutData(passwordTextGD);
		passwordText.setEchoChar('*');

		//Listener auf Enter
		usernameText.addListener (SWT.DefaultSelection, new Listener () {
			public void handleEvent (Event e) {
				passwordText.setFocus();
			}
		});
		passwordText.addListener (SWT.DefaultSelection, new Listener () {
			public void handleEvent (Event e) {

			}
		});

		//5.Reihe: Linie
		line = new Label(loginSh, SWT.SEPARATOR | SWT.HORIZONTAL | SWT.CENTER);
		line.setLayoutData(lineGD);

		//6.Reihe: Button
		//Button ok
		Button ok = new Button(loginSh, SWT.CENTER);
		ok.setText("&OK");
		ok.setLayoutData(getButtonGridData(GridData.HORIZONTAL_ALIGN_BEGINNING));
		ok.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				loginSh.close();
				enableButton();
			}
			public void widgetDefaultSelected(SelectionEvent e) {
			}
		});
		ok.pack();

		//Button abbruch
		Button ca = new Button(loginSh, SWT.CENTER);
		ca.setText("&Cancel");
		ca.setLayoutData(getButtonGridData(GridData.HORIZONTAL_ALIGN_END));
		ca.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				loginSh.close();
			}
		});
		
		loginSh.pack();
		loginSh.open();

		//LOGIN in der Mitte der Toplevel oeffnen
		Rectangle displayBounds = display.getBounds();
		Point dialogSize = loginSh.getSize();
		loginSh.setLocation(
				displayBounds.x + (displayBounds.width - dialogSize.x) / 2,
				displayBounds.y + (displayBounds.height - dialogSize.y) / 2
		);

		while (!loginSh.isDisposed()) {
			if (!display.readAndDispatch()) display.sleep();
		}
	}//doLogin