PDF printing help!!! Urgent help plz!!!

Hi, I am trying to print PDF file from windows service. If I ran the code interactively, printing is working great. If i try to print, it was not printing, Even i won't see any exception.
Basically i want to display multiple PDF files from my service.Is there any way that a PDF stream can
be sent directly to the printer without having to open Adobe? If you have any better solution that would be great. Any help
would be appreciated, especially sample codes? :)