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 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 htmlToPdfConverter.ConversionDelay = 2 ' Select all images from HTML page htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementSelectors = New String() {"img"} ' Exclude the original images from rendering becuase they will be replaced by an image from local file system htmlToPdfConverter.HiddenHtmlElementsSelectors = New String() {"img"} Cursor = Cursors.WaitCursor Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Replace_with_Higher_Quality_Images.pdf" Dim pdfDocument As Document = Nothing Try ' Convert a HTML string with images to replace to a PDF document object pdfDocument = htmlToPdfConverter.ConvertUrlToPdfDocumentObject(urlTextBox.Text) ' Replace the images selected in HTML using special attributes with images from local file system For Each imageElementInfo As HtmlElementMapping In htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult Dim imagePdfPage As PdfPage = imageElementInfo.PdfRectangles(0).PdfPage Dim imageRectangle As RectangleF = imageElementInfo.PdfRectangles(0).Rectangle Dim newImageElement As New ImageElement(imageRectangle.X, imageRectangle.Y, imageRectangle.Width, imageRectangle.Height, "DemoAppFiles\Input\Images\box.jpg") newImageElement.EnlargeEnabled = True imagePdfPage.AddElement(newImageElement) Next imageElementInfo ' 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