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I've never heard of such a thing being available for Reader. Reader plug-ins are very restricted in what they are allowed to do, particularly with security-related stuff.
Consider taking a different approach that uses a Java-based PDF viewer component to open and display the PDFs.
You may look for a DRM solution.
1. DRM: Current solutions are v. costly, unreliable (eg. insecure) and not user friendly; they may improve but I've not been impressed with the current offering.
2. Java pluggin: All we'd require of this is to be able to 'communicate' with Reader.
3. Java-based pdf viewer: True, but a) Since they aren't ubiquitous could and would we be able to package with our software. b) Would such a viewer respect' the pdf restrictions specified (eg. no copying/ printing but allow comments)? c) Any suggestions for such a viewer?
In response to #3, you'll have to find out for yourself. I've never used one, but I know they're available. You should be able to include them in you app.
And even if you were able to do it (which I'm not sure you can), what would prevent someone from distributing the Java app instead of the PDF?
The Java app can be required to have activation over the net periodically or even be locked, via its licence, to one computer using the MAC address.
I'll try the SDK group. Thanks.