BlackBerry.Screen.Context.RegisterWindow C# (CSharp) Method

        internal void RegisterWindow(Window win)
        {
            windows.Add (win.Handle, win);
        }

 //public Window () : this (Context.GetInstance (ContextType.Application)) {}
 //public Window (WindowType type) : this (Context.GetInstance (ContextType.Application), type) {}
 public Window(Context ctx, WindowType type = WindowType.SCREEN_APPLICATION_WINDOW)
 {
     context = ctx;
     if (screen_create_window_type (out handle, ctx.Handle, type) != 0) {
         throw new Exception ("Unable to create window");
     }
     if (type != WindowType.SCREEN_APPLICATION_WINDOW &&
         type != WindowType.SCREEN_CHILD_WINDOW) {
         return;
     }
     if (screen_create_window_group (handle, handle.ToString ()) != 0) {
         throw new Exception ("Unable to create window group");
     }
     context.RegisterWindow (this);
 }