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="

    Cursor = Cursors.WaitCursor

    ' Convert HTML to PDF using the settings above
    Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Set_Initial_Zoom_Level.pdf"
    Dim pdfDocument As Document = Nothing
    Try
        ' Convert a HTML page to a PDF document object
        pdfDocument = htmlToPdfConverter.ConvertUrlToPdfDocumentObject(urlTextBox.Text)

        Dim goToPageNumber As Integer = Integer.Parse(pageNumberTextBox.Text)
        If goToPageNumber > pdfDocument.Pages.Count Then
            MessageBox.Show("The page number is too big")
            Return
        End If

        ' Get destination PDF page
        Dim goToPage As PdfPage = pdfDocument.Pages(goToPageNumber - 1)

        ' Get the destination point in PDF page
        Dim goToX As Single = Single.Parse(xLocationTextBox.Text)
        Dim goToY As Single = Single.Parse(yLocationTextBox.Text)

        Dim goToLocation As New PointF(goToX, goToY)

        ' Get the destination view mode
        Dim viewMode As DestinationViewMode = SelectedViewMode()

        ' Create the destination in PDF document
        Dim goToDestination As New ExplicitDestination(goToPage, goToLocation, viewMode)

        ' Set the zoom level when the destination is displayed
        If viewMode = DestinationViewMode.XYZ Then
            goToDestination.ZoomPercentage = Integer.Parse(zoomLevelTextBox.Text)
        End If

        ' Set the document Go To open action
        pdfDocument.OpenAction.Action = New PdfActionGoTo(goToDestination)

        ' Save the PDF document in a memory buffer
        Dim outPdfBuffer() As Byte = pdfDocument.Save()

        ' 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
        ' Close the PDF document
        If pdfDocument IsNot Nothing Then
            pdfDocument.Close()
        End If

        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