Non-interactive printing in Adobe Acrobat or Adobe Reader is only permitted within console, batch or menu events when the PDF is being viewed in the desktop product - nothing in the document or in the HTML page or browser window within which the PDF is displayed can trigger silent printing - the malicious possibilities for a PDF which could do that are endless! Imagine a 2000-page document which unstoppably-prints itself each time it's opened...
Ok, thank you for your answer.
I was sure there will be some pluggin or script to install on client computers to prevent this message to show up ...
Anyway, I will try an other approach wih java applet... (I find this who does what I want, just have to try to do it by myself now : http://www.activetree.com/silent_print_pdf_from_browser/)
i wrote an article how to open and show and silent print pdfs in Windows and Mac OSX with examples (using native commands):
even if is for Adobe Air you can you native commands examples for any other programming language
If you use Foxit Reader instead of Acrobat from the command line, you won't get a popup of the reader window.