private void convertToImageButton_Click(object sender, EventArgs e)
{
    // Create a HTML to Image converter object with default settings
    HtmlToImageConverter htmlToImageConverter = new HtmlToImageConverter();

    // Set license key received after purchase to use the converter in licensed mode
    // Leave it not set to use the converter in demo mode
    htmlToImageConverter.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=";

    // Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
    htmlToImageConverter.HtmlViewerWidth = int.Parse(htmlViewerWidthTextBox.Text);

    // Set HTML viewer height in pixels to convert the top part of a HTML page 
    // Leave it not set to convert the entire HTML
    if (htmlViewerHeightTextBox.Text.Length > 0)
        htmlToImageConverter.HtmlViewerHeight = int.Parse(htmlViewerHeightTextBox.Text);

    // Set if the created image has a transparent background
    htmlToImageConverter.TransparentBackground = SelectedImageFormat() == System.Drawing.Imaging.ImageFormat.Png ? transparentBackgroundCheckBox.Checked : false;
            
    // Set the maximum time in seconds to wait for HTML page to be loaded 
    // Leave it not set for a default 60 seconds maximum wait time
    htmlToImageConverter.NavigationTimeout = int.Parse(navigationTimeoutTextBox.Text);

    // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
    // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
    if (conversionDelayTextBox.Text.Length > 0)
        htmlToImageConverter.ConversionDelay = int.Parse(conversionDelayTextBox.Text);

    Cursor = Cursors.WaitCursor;

    // Convert HTML to Image using the settings above
    string outImageFile = @"DemoAppFiles\Output\HTML_to_Image\HTML_to_Image." + imageFormatComboBox.SelectedItem.ToString().ToLower();
    Image[] imageTiles = null;
    try
    {
        if (convertUrlRadioButton.Checked)
        {
            string url = urlTextBox.Text;

            // Convert the HTML page given by an URL to a set of Image objects
            imageTiles = htmlToImageConverter.ConvertUrlToImageTiles(url);
        }
        else
        {
            string htmlString = htmlStringTextBox.Text;
            string baseUrl = baseUrlTextBox.Text;

            // Convert a HTML string with a base URL to a set of Image objects
            imageTiles = htmlToImageConverter.ConvertHtmlToImageTiles(htmlString, baseUrl);
        }

        // Save the first image tile to a memory buffer

        Image outImage = imageTiles[0];

        // Create a memory stream where to save the image
        System.IO.MemoryStream imageOutputStream = new System.IO.MemoryStream();

        // Save the image to memory stream
        outImage.Save(imageOutputStream, SelectedImageFormat());

        // Write the memory stream to a memory buffer
        imageOutputStream.Position = 0;
        byte[] outImageBuffer = imageOutputStream.ToArray();

        // Close the output memory stream
        imageOutputStream.Close();

        // Write the memory buffer in an image file
        System.IO.File.WriteAllBytes(outImageFile, outImageBuffer);
    }
    catch (Exception ex)
    {
        // The HTML to Image conversion failed
        MessageBox.Show(String.Format("HTML to Image Error. {0}", ex.Message));
        return;
    }
    finally
    {
        Cursor = Cursors.Arrow;
    }

    // Open the created image in the default viewer for image format
    try
    {
        System.Diagnostics.Process.Start(outImageFile);
    }
    catch (Exception ex)
    {
        MessageBox.Show(String.Format("Cannot open created image file '{0}'. {1}", outImageFile, ex.Message));
    }
}