Printer Functions - print a file

I've scoured the php.net online manual and other notes about Printer functions and do not see how I simply send a file to the printer using the Printer functions. Can anyone help? (I can open my printer and print text to a page, but I do not see how to simply print an existing file - a gif image file, in this case.) Thanks in advance for any help. -- ***************************** Chuck Anderson • Boulder, CO http://www.CycleTourist.com *****************************