private void Back_Click(object sender, RoutedEventArgs e) // 뒤로 { SHDocVw.ShellWindows shellWindows = new SHDocVw.ShellWindows(); IntPtr handle = GetForegroundWindow(); foreach (SHDocVw.WebBrowser IE in shellWindows) { if (IE.HWND.Equals(handle.ToInt32())) { if (!IE.Busy) { try { IE.GoBack(); } catch { Console.WriteLine("err"); } } } } }