>>>>Hi all,
>>>>
>>>>I've got a requirement that for an existing PDF I need to protect it with a password.
>>>>Can anyone recommend an API, usable from VFP (and possible .NET) to do this ?
>>>>
>>>>Thanks in advance,
>>>>
>>>>Walter
>>>
>>>Walter, you can use the PdfTK for that. They have a server operable from the command line that that we integrated easily into our applications where PDF manipulation functionalities were required.
>>>
>>>To get your password protected PDFs (variable arguments in bold):
>>
>>
>>>pdftk.exe source.pdf output protected.pdf user_pw password
>>>
>>>PdfTk website and server's page: https://www.pdflabs.com/tools/pdftk-server/
>>
>>
>>
>>Thanks antonio, This seems to fit to what we need. One question left: Can you distribute it to clients ? Any specific install needed or can you just execute it as a exe file ?
>
>Walter, to distribute the server to clients you need to purchase a Server license, unless your application is GPLicensed. Your clients may eventually purchase their own copies of the Toolkit Pro which includes a server, but you're not allowed to distribute it without a license.
>
>An installer is normally required, but I don't know if it can be replaced by a simpler deployment of the exe + dll.

Hmmmm, that is a bit of a complication. We do have a client install for our product, but since we are talking about thousands of workstations at over a 100 clients, this is getting a bit of a setback.