Suppress window 'This document is trying to print'

Yes, to print silently the script calling the "print" function has to be privileged. This is something that can only be done in a local environment. On your own machine, or in an office environment. A document that is distributed to arbitrary users cannot do anything silently. That would be a security problem.

There are two ways to create a privileged script:
1. Place the "print" into a folder level trusted function
2. Certify the PDF, The certifying signature must be on the system where the PDF is used.

Thom Parker
The source for PDF Scripting Info
[url=http://www.pdfScripting.com]pdfscripting.com[/url]

The Acrobat JavaScript Reference, Use it Early and Often
[url=http://www.adobe.com/devnet/acrobat/javascript.php]http://www.adobe.com/devnet/acrobat/javascript.php[/url]

Then most important JavaScript Development tool in Acrobat
[url=http://www.pdfscripting.com/public/34.cfm#JSIntro][b]The Console Window (Video tutorial)[/b][/url]
[url=http://www.acrobatusers.com/tutorials/2006/javascript_console][b]The Console Window(article)[/b][/url]

Thanks Thom. While I do have the script inside a folder level trusted function, I neglected to add app.beginPriv() and app.endPriv() before and after the Print method.