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

        internal void UnregisterWindow(Window win)
        {
            windows.Remove (win.Handle);
        }

 public void Dispose()
 {
     context.UnregisterWindow(this);
     if (screen_destroy_window(handle) != 0)
     {
         // TODO: read errno
         throw new Exception("Unable to destroy window");
     }
 }