Java Code:
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Sash;
import org.eclipse.swt.widgets.Shell;

public class SashExample {

public static void main (String [] args) {
  Display display = new Display ();
  Shell shell = new Shell (display);
  final Sash sash = new Sash (shell, SWT.BORDER | SWT.VERTICAL);
  sash.setBounds (10, 10, 15, 60);

  sash.addListener (SWT.Selection, new Listener () {
    public void handleEvent (Event e) {
      System.out.println("Selected. ");
      sash.setBounds (e.x, e.y, e.width, e.height);
    }
  });
  shell.open ();
  sash.setFocus ();
  while (!shell.isDisposed ()) {
    if (!display.readAndDispatch ()) display.sleep ();
  }
  display.dispose ();
}
}