setText in event

[sniezna.stopa]

Hello! I have something like this in my SWT/JFace tutorial application:

                text = new Text(parent, SWT.LEFT);
		text.addVerifyListener(new VerifyListener()
		{
			@Override
			public void verifyText(VerifyEvent arg0)
			{
				text.setText("blah blah");
			}
		});

Why the text isn't updated in event? (text has only letters, whitch I pressed, but dont contain the "blah blah" text)