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Example 1: Sign a PDF file with an invisible signature (VB.Net)  
   Dim NVsign : NVsign = CreateObject("Neevia.PDFsign")

   NVsign.CertificateSubject = "Test certificate"
   NVsign.CertificatePassword = "password"

   NVsign.Reason = "I am the creator of this document"

   NVsign.Invisible = true
 
   Dim retVal : retVal = NVsign.SignPDF("c:\in.pdf","c:\out.pdf")
   If retVal <> 0 Then
     MsgBox("Error code=" & CStr(retVal))
   Else
     MsgBox("Done")
   End If


I was looking for a product that could place watermarks on very large PDF files (some of them over 30 thousand pages) in as less time as possible. After testing many tools I found Neevia PDFstamp. It did the job!

Avi Steinman

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