SWT.NO
import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.MessageBox; import org.eclipse.swt.widgets.Shell; public class MainClass { public static void main(String[] a) { Shell s = new Shell(); MessageBox messageBox = new MessageBox(s, SWT.ICON_QUESTION | SWT.YES | SWT.NO); messageBox.setMessage("Do you really want to exit?"); messageBox.setText("Exiting Application"); int response = messageBox.open(); if (response == SWT.YES) System.out.println(SWT.YES); else if(response == SWT.NO) System.out.println(SWT.NO); } }