    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=";

        // Enable extensions including the Flash support
        // The converter does not have a built-in Flash player and it uses the installed Flash plugin
        // for Google Chrome or Mozilla Firefox
        htmlToPdfConverter.ExtensionsEnabled = extensionsEnabledCheckBox.Checked;

        // Set an adddional delay in seconds to wait for Flash to run
        // Set this property to 0 if you want to start conversion immediately
        htmlToPdfConverter.ConversionDelay = int.Parse(conversionDelayTextBox.Text);

        Cursor = Cursors.WaitCursor;

        // Convert HTML to PDF using the settings above
        string outPdfFile = @"DemoAppFiles\Output\HTML_to_PDF\Flash_to_PDF.pdf";
        try
        {
            // Convert the HTML page with Flash to a PDF document in a memory buffer
            byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(urlTextBox.Text);

            // 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));
        }
    }