private void btn_login_Click(object sender, RoutedEventArgs e)
 {
     if (Login(tb_usr.Text, tb_pw.Password))
     {
         WindowState          = System.Windows.WindowState.Minimized;
         btn_login.IsEnabled  = false;
         btn_logout.IsEnabled = true;
         RememberConfig.SaveConfig(tb_usr.Text, tb_pw.Password);
     }
 }
        private void MetroWindow_Loaded(object sender, RoutedEventArgs e)
        {
            IntPtr handle  = Process.GetCurrentProcess().MainWindowHandle;
            int    exStyle = (int)GetWindowLong(handle, (int)GetWindowLongFields.GWL_EXSTYLE);

            exStyle |= (int)ExtendedWindowStyles.WS_EX_TOOLWINDOW;
            SetWindowLong(handle, (int)GetWindowLongFields.GWL_EXSTYLE, (IntPtr)exStyle);

            string usr, pw;

            RememberConfig.GetConfig(out usr, out pw);
            tb_usr.Text    = usr;
            tb_pw.Password = pw;
        }