Shell dialog = new Shell(parent.getShell(), SWT.APPLICATION_MODAL);

                dialog.setMinimumSize(parent.getShell().getSize().x - 200, 0);
                dialog.setLocation(100, 0);
                dialog.setLayout(new GridLayout(1, false));

                Text t = new Text(dialog, SWT.MULTI | SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
                GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);
                gridData.heightHint = 50;
                t.setText("USE CRTL for a MNEMONIC demo ...  or crtl+x ESC or d to check for hotkey handling");

                Button closeButton = new Button(dialog, SWT.NONE);
                closeButton.setText("&E Close");
                closeButton.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        dialog.close();
                    }
                });

                dialog.setData(RWT.CANCEL_KEYS, new String[]{"ESC"});
                dialog.setData(RWT.ACTIVE_KEYS, new String[]{"CTRL+X"});
                dialog.addKeyListener(new KeyListener() {
                    @Override
                    public void keyPressed(KeyEvent keyEvent) {
                        t.setText("Key Event here " + keyEvent) ;
                        keyEvent.doit = false;
                    }

                    @Override
                    public void keyReleased(KeyEvent keyEvent) {

                    }
                });

                dialog.pack();
                dialog.open();

gridData.heightHint() 

t.setLayoutData(gridData)  

 
dialog.addListener(SWT.Close, new Listener()
                {
                    public void handleEvent(Event event)
                    {
                        t.setText("This was the dialog.listener()");
                        event.doit = false;
                    }
                });