I have Got a Challenging Question in My Mind. I dunno How to Implement it.. But Here is My Requirement There is a server and server gets request from many computers( say 10 computers) to print a document.. server sends request to printer And Printer Prints all these documents... My Requirement is I need to Trace Which Computer Has Printed Which Document... At My End, There is Only Printer... is it really possible to trace the comp which has printed that document? Can WE Make use of Network related stuff by analysing The Header part of The Packets sent by server during The Transmission????? what exactly i need to do to get solution for this..>> First, I need to Know How to do it.. and Then if it is possible .. i need a C++ Program or any program which can be used to make it work..... I guess, You would have understand my point.. Can Anyone Please Help Me In Getting Solution?? Thanks -cheTan