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 the media type for which to render HTML to PDF
    htmlToPdfConverter.MediaType = If(printMediaTypeRadioButton.Checked, "print", "screen")

    Cursor = Cursors.WaitCursor

    Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Select_Screen_or_Print_Media_Type.pdf"
    Try
        Dim outPdfBuffer() As Byte = Nothing

        If convertHtmlRadioButton.Checked Then
            Dim htmlWithForm As String = htmlStringTextBox.Text
            Dim baseUrl As String = baseUrlTextBox.Text

            ' Convert a HTML string to a PDF document for the selected media type
            outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlWithForm, baseUrl)
        Else
            Dim url As String = urlTextBox.Text

            ' Convert the HTML page to a PDF document for the selected media type
            outPdfBuffer = htmlToPdfConverter.ConvertUrl(url)
        End If

        ' Write the memory buffer in a PDF file
        System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer)
    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