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Example 4: Encrypt a PDF file (VC++)  

   #include "stdafx.h"

   #using <mscorlib.dll>
   #import "PDFsign.tlb" no_namespace named_guids 
   using namespace System;

   int _tmain()
   {
	IPDFsignPtr NVsign;	
	::CoInitialize(NULL); 

	NVsign.CreateInstance(__uuidof(PDFsign)); 

	NVsign->PutPDFEncrypt(true);
	NVsign->PutPDFEncryptionType("rc4");
	NVsign->PutPDFOwnerPassword("owner");

 	// p - document printing is denied
  	// e - disable extraction of text and graphics

	NVsign->PutPDFPermissions("pe");

	NVsign->EncryptPDF("c:\\in.pdf", "c:\\out.pdf");

	Console::WriteLine(S"Done.");
	return 0;
   }

We use the ActiveX component that comes with PDFmerge/split to manipulate large volumes of PDF files. Great product and accurate customer support!!!

David Cogney

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