SWT.Close

The close event type (value is 21).

@see org.eclipse.swt.widgets.Widget#addListener @see org.eclipse.swt.widgets.Display#addListener @see org.eclipse.swt.widgets.Display#addFilter @see org.eclipse.swt.widgets.Event

@see org.eclipse.swt.widgets.Shell#addShellListener @see org.eclipse.swt.events.ShellListener#shellClosed @see org.eclipse.swt.events.ShellEvent