Protected Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs)
    ' Create a HTML to PDF converter object with default settings
    Dim htmlToPdfConverter As 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 = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og="

    ' Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
    htmlToPdfConverter.HtmlViewerWidth = Integer.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 Then
        htmlToPdfConverter.HtmlViewerHeight = Integer.Parse(htmlViewerHeightTextBox.Text)
    End If

    ' 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 = Integer.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 Then
        htmlToPdfConverter.ConversionDelay = Integer.Parse(conversionDelayTextBox.Text)
    End If

    ' The buffer to receive the generated PDF document
    Dim outPdfBuffer() As Byte = Nothing

    If convertUrlRadioButton.Checked Then
        Dim url As String = urlTextBox.Text

        ' Convert the HTML page given by an URL to a PDF document in a memory buffer
        outPdfBuffer = htmlToPdfConverter.ConvertUrl(url)
    Else
        Dim htmlString As String = htmlStringTextBox.Text
        Dim baseUrl As String = baseUrlTextBox.Text

        ' Convert a HTML string with a base URL to a PDF document in a memory buffer
        outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlString, baseUrl)
    End If

    ' Send the PDF as response to browser

    ' Set response content type
    Response.AddHeader("Content-Type", "application/pdf")

    ' Instruct the browser to open the PDF file as an attachment or inline
    Response.AddHeader("Content-Disposition", String.Format("{0}; filename=Getting_Started.pdf; size={1}", If(openInlineCheckBox.Checked, "inline", "attachment"), outPdfBuffer.Length.ToString()))

    ' Write the PDF document buffer to HTTP response
    Response.BinaryWrite(outPdfBuffer)

    ' End the HTTP response and stop the current page processing
    Response.End()
End Sub