public ProgressWindow(Wallbase wall)
        {
            InitializeComponent();

            bw.RunWorkerCompleted += (sender, e) =>
            {
                bw.Dispose();
            };

            bw.DoWork += (sender, e) =>
            {
                try
                {
                    wall.OnWallbaseDownload += wall_OnWallbaseDownload;
                    wall.DownloadWallpapers();
                }
                catch (Exception ex)
                {
                    System.Windows.Forms.MessageBox.Show("There was an error trying to download: " + ex.Message + "\n\nPerhaps your login was wrong?", "Error",
                        MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            };

            bw.RunWorkerAsync();
        }