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 if the fonts are embedded in the generated PDF document
    ' Leave it not set to embed the fonts in the generated PDF document
    htmlToPdfConverter.PdfDocumentOptions.EmbedFonts = embedFontsCheckBox.Checked

    Cursor = Cursors.WaitCursor

    ' Convert HTML to PDF using the settings above
    Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Embed_Fonts_in_PDF.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