wpf open multiple / duplicate of the same window

Question

Hoping you can help on this one as I am getting a little stuck. I am new and learning C# / WPF Language and by doing so have decided to create an application. The application itself works, but for functionality I need to make a slight change.

The application consists of 3 windows (Settings, Control Panel, Display Screen). The Control Panel is designed so that on clicks it updates labels / textboxes etc on the Display Screen. This works perfectly fine. However my issue was when I decided to open a 2nd Display Screen (a duplicate of the first).

This is what I have at the minute:

namespace WpfApplication2
{
/// <summary>
/// Interaction logic for Controller.xaml
/// </summary>
    public partial class Controller : Window
    {
        MainWindow bWin = new MainWindow();
        public Controller()
        {
            InitializeComponent();
            bWin.Show();
        }

        private void btnNewScreen_Click(object sender, RoutedEventArgs e)
        {
            bWin.Show();
        }

The btnNewScreen does not open a 2nd instance of the Display window. The display screen has a timer on it (wonder if this needs moving to the controller??) the timer counts down for 5 minutes or whatever is set, but this needs to be the same on both displays. So if one starts and is at 4 minutes both windows should show 4 minutes (not one showing 4 and 1 showing 5).

I NEED AN EXACT DUPLICATE OF THE DISPLAY WINDOW (2 x bwin) AND THE CONTROL PANEL NEEDS TO BE ABLE TO MODIFY BOTH THE WINDOWS AT THE SAME TIME. (Like a mirror of the first Display Window).

I Want my Application to:

• Be Controlled from the Control Panel Window
• Open Multiple versions of the same Display Window
• Control Panel to update each Display Window Identically
• Have a timer that runs a clock down on each display window (I have already worked how to run a clock down but not sure if it needs changing to be on control panel rather than display window)

I am sure this is possible, but not quite sure how to get it working properly.

Hopefully I am making sense with the question. Any queries I will try my best to answer you. (NB, I am making a basic scoreboard to show on 2 monitors at each end of the court).

PS.. (I messed up so my Application has the cool name of WPFApplication2... I know.. I know.. hehe)

Thanks Mex.