private void takeScreenShotBtn_Click(object sender, EventArgs e)
        {
            if (tabControl.SelectedIndex < 0)
            {
                return;
            }
            var selTab = tabControl.SelectedIndex;

            if (pluginMain.Overlays.Count < 1)
            {
                return;
            }
            IOverlay selectedOverlay = pluginMain.Overlays[selTab];

            try
            {
                selectedOverlay.TakeScreenShot(
                    new ScreenshotConfig
                {
                    SavePath            = config.ScreenShotSavePath,
                    AutoClipping        = config.ScreenShotAutoClipping,
                    BackgroundImagePath = config.ScreenShotBackgroundPath,
                    BackgroundMode      = (ScreenshotBackgroundMode)config.ScreenShotBackgroundMode,
                    Margin = config.ScreenShotMargin,
                });
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.GetBaseException().ToString());
            }
        }