Want to save time? You will save a lot of time on writing and testing code as you may just take the VB.NET code from ByteScout PDF Suite for add image stamp in pdf with pdf extractor sdk below and use it in your application. Just copy and paste the code into your VB.NET application’s code and follow the instructions. If you want to use these VB.NET sample examples in one or many applications then they can be used easily.
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Imports System.Drawing Imports Bytescout.PDFExtractor Namespace AddImageStampInPDF Class Program Shared Sub Main(ByVal args As String()) Dim inputFile As String = ".\Invoice.pdf" Dim outputFile As String = ".\Invoice_Stamped.pdf" Dim stampImageFile As String = ".\stamp_image.png" Using stamper As New Stamper("demo", "demo") ' Optionally make the image background transparent ' stamper.MakeStampImageTransparent = true Using image As Image = Image.FromFile(stampImageFile) ' Get image size in PDF units Dim imageSizeInPoints As SizeF = stamper.GetImageSizeInPoints(image) Dim Rectangle = New RectangleF(440, 370, imageSizeInPoints.Width / 3, imageSizeInPoints.Height / 3) stamper.Stamp(inputFile, outputFile, image, Rectangle, 0, -1) End Using End Using ' Open result file in default associated application (for demo purposes) Process.Start(outputFile) End Sub End Class End Namespace