private void activate_Click(object sender, RoutedEventArgs e)
        {
            Button b = sender as Button;

            if (b != null)
            {
                DisplayRequestInfo info = App.ActivateDisplayRequest();
                switch (info.ActivationResult)
                {
                case ActivationResult.Activated:
                    status.Log(string.Format(CultureInfo.CurrentCulture,
                                             LocalizableStrings.DISPLAY_REQUEST_ACTIVATED, info.ActivationTime.ToString("HH:mm:ss", CultureInfo.CurrentCulture)));
                    break;

                case ActivationResult.PreviouslyActivated:
                    status.Log(string.Format(CultureInfo.CurrentCulture,
                                             LocalizableStrings.DISPLAY_REQUEST_ALREADY_ACTIVATED, info.ActivationTime.ToString("HH:mm:ss", CultureInfo.CurrentCulture)));
                    break;

                default:
                    status.Log(LocalizableStrings.DISPLAY_REQUEST_NOT_ACTIVATED);
                    break;
                }
            }
        }