AdvancedLauncher.UI.Windows.MainWindow.OnClosingLocked C# (CSharp) Метод

        private void OnClosingLocked(object sender, LockedEventArgs e)
        {
            if (!this.Dispatcher.CheckAccess()) {
                this.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal, new LockedChangedHandler((s, e2) => {
                    OnClosingLocked(sender, e2);
                }), sender, e);
                return;
            }
            if (hWnd == IntPtr.Zero) {
                hWnd = new System.Windows.Interop.WindowInteropHelper(Application.Current.MainWindow).Handle;
            }
            //Заблокировать закрытие окна
            IsCloseLocked = e.IsLocked;
            this.IsCloseButtonEnabled = !e.IsLocked;
            //Отключим кнопку "Х"
            NativeMethods.EnableMenuItem(NativeMethods.GetSystemMenu(hWnd, false),
                NativeMethods.SC_CLOSE,
                e.IsLocked ? NativeMethods.MF_DISABLED | NativeMethods.MF_GRAYED : NativeMethods.MF_ENABLED);
        }