    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 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
        htmlToPdfConverter.ConversionDelay = 2;

        string param1Name = param1NameTextBox.Text.Length > 0 ? param1NameTextBox.Text : "param1";
        string param1Value = param1ValueTextBox.Text.Length > 0 ? param1ValueTextBox.Text : "Value 1";

        string param2Name = param2NameTextBox.Text.Length > 0 ? param2NameTextBox.Text : "param2";
        string param2Value = param2ValueTextBox.Text.Length > 0 ? param2ValueTextBox.Text : "Value 2";

        string param3Name = param3NameTextBox.Text.Length > 0 ? param3NameTextBox.Text : "param3";
        string param3Value = param3ValueTextBox.Text.Length > 0 ? param3ValueTextBox.Text : "Value 3";

        string param4Name = param4NameTextBox.Text.Length > 0 ? param4NameTextBox.Text : "param4";
        string param4Value = param4ValueTextBox.Text.Length > 0 ? param4ValueTextBox.Text : "Value 4";

        string param5Name = param5NameTextBox.Text.Length > 0 ? param5NameTextBox.Text : "param5";
        string param5Value = param5ValueTextBox.Text.Length > 0 ? param5ValueTextBox.Text : "Value 5";

        string urlToConvert = urlTextBox.Text;

        if (postMethodRadioButton.Checked)
        {
            htmlToPdfConverter.HttpPostFields.Add(param1Name, param1Value);
            htmlToPdfConverter.HttpPostFields.Add(param2Name, param2Value);
            htmlToPdfConverter.HttpPostFields.Add(param3Name, param3Value);
            htmlToPdfConverter.HttpPostFields.Add(param4Name, param4Value);
            htmlToPdfConverter.HttpPostFields.Add(param5Name, param5Value);
        }
        else
        {
            Uri getMethodUri = new Uri(urlTextBox.Text);

            string query = getMethodUri.Query.Length > 0 ? "&" : "?" + String.Format("{0}={1}", param1Name, param1Value);
            query += String.Format("&{0}={1}", param2Name, param2Value);
            query += String.Format("&{0}={1}", param3Name, param3Value);
            query += String.Format("&{0}={1}", param4Name, param4Value);
            query += String.Format("&{0}={1}", param5Name, param5Value);

            urlToConvert = urlTextBox.Text + query;
        }

        Cursor = Cursors.WaitCursor;

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

            // 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));
        }
    }