/// Initialize a new instance of the <see cref="SystemHotKeyMessageFilter"/> with /// the specific <see cref="SystemHotKeyListener"/> /// <param name="listner">An instance of the <see cref="SystemHotKeyListener"/>.</param> public SystemHotKeyMessageFilter(SystemHotKeyListener listner) { if (listner == null) { throw new ArgumentNullException("listner"); } _listner = listner; }