    private void convertToPdfButton_Click(object sender, EventArgs e)
    {
        // Create a HTML to PDF converter object with default settings
        HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

        // Set license key received after purchase to use the converter in licensed mode
        // Leave it not set to use the converter in demo mode
        htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

        // Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
        htmlToPdfConverter.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)
            htmlToPdfConverter.HtmlViewerHeight = int.Parse(htmlViewerHeightTextBox.Text);

        // Set PDF page size which can be a predefined size like A4 or a custom size in points
        // Leave it not set to have a default A4 PDF page
        htmlToPdfConverter.PdfDocumentOptions.PdfPageSize = SelectedPdfPageSize();

        // Set PDF page orientation to Portrait or Landscape
        // Leave it not set to have a default Portrait orientation for PDF page
        htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation = SelectedPdfPageOrientation();

        // 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
        htmlToPdfConverter.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)
            htmlToPdfConverter.ConversionDelay = int.Parse(conversionDelayTextBox.Text);

        Cursor = Cursors.WaitCursor;

        // Convert HTML to PDF using the settings above
        string outPdfFile = @"DemoAppFiles\Output\HTML_to_PDF\Getting_Started.pdf";
        try
        {
            if (convertUrlRadioButton.Checked)
            {
                string url = urlTextBox.Text;

                // Convert the HTML page given by an URL to a PDF document in a memory buffer
                byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(url);

                // Write the memory buffer in a PDF file
                System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer);
            }
            else
            {
                string htmlString = htmlStringTextBox.Text;
                string baseUrl = baseUrlTextBox.Text;

                // Convert a HTML string with a base URL to a PDF document in a memory buffer
                byte[] outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlString, baseUrl);

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

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