Private Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles convertToPdfButton.Click
    ' 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

    Cursor = Cursors.WaitCursor

    ' Convert HTML to PDF using the settings above
    Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Getting_Started.pdf"
    Try
        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
            Dim outPdfBuffer() As Byte = htmlToPdfConverter.ConvertUrl(url)

            ' Write the memory buffer in a PDF file
            System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer)
        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
            Dim outPdfBuffer() As Byte = htmlToPdfConverter.ConvertHtml(htmlString, baseUrl)

            ' Write the memory buffer in a PDF file
            System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer)
        End If
    Catch ex As Exception
        ' The HTML to PDF conversion failed
        MessageBox.Show(String.Format("HTML to PDF Error. {0}", ex.Message))
        Return
    Finally
        Cursor = Cursors.Arrow
    End Try

    ' Open the created PDF document in default PDF viewer
    Try
        Process.Start(outPdfFile)
    Catch ex As Exception
        MessageBox.Show(String.Format("Cannot open created PDF file '{0}'. {1}", outPdfFile, ex.Message))
    End Try
End Sub