Private Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles convertToPdfButton.Click ' Create the PDF document where to add the HTML documents Dim pdfDocument As New Document() ' Set license key received after purchase to use the converter in licensed mode ' Leave it not set to use the converter in demo mode pdfDocument.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=" ' Create a PDF page where to add the first HTML Dim firstPdfPage As PdfPage = pdfDocument.AddPage() Cursor = Cursors.WaitCursor Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Merge_Multipe_HTML.pdf" Try ' Create the first HTML to PDF element Dim firstHtml As New HtmlToPdfElement(0, 0, firstUrlTextBox.Text) ' Optionally set a delay before conversion to allow asynchonous scripts to finish firstHtml.ConversionDelay = 2 ' Add the first HTML to PDF document Dim firstAddResult As AddElementResult = firstPdfPage.AddElement(firstHtml) Dim secondPdfPage As PdfPage = Nothing Dim secondHtmlLocation As PointF = Point.Empty If startNewPageCheckBox.Checked Then ' Create a PDF page where to add the second HTML secondPdfPage = pdfDocument.AddPage() secondHtmlLocation = PointF.Empty Else ' Add the second HTML on the PDF page where the first HTML ended secondPdfPage = firstAddResult.EndPdfPage secondHtmlLocation = New PointF(firstAddResult.EndPageBounds.Left, firstAddResult.EndPageBounds.Bottom) End If ' Create the second HTML to PDF element Dim secondHtml As New HtmlToPdfElement(secondHtmlLocation.X, secondHtmlLocation.Y, secondUrlTextBox.Text) ' Optionally set a delay before conversion to allow asynchonous scripts to finish secondHtml.ConversionDelay = 2 ' Add the second HTML to PDF document secondPdfPage.AddElement(secondHtml) ' 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 pdfDocument.Close() 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