printing file/image on default Printer

[Askari]

Hi,
   I search how "I" can printing file/image with a script but the user (who 
use my script) must DO NOTHING (other that dealing with my GUI). e.g. : 
with AdobeAcrobat, the user must click "ok" in the "pre"printing windows.

My solutions, but NOT ok :
 - Build a .pdf (with reportLab) and print with Adode
 - Build a image file and print it with "DisplayImage.py" but don't work 
(error raised)

(note : the OS, for my problem, is just Windows)

Someone have a other idea/solution? 

Askari