I am writing an Internet Cafe application and have mostly all of it complete.
However, I am trying to implement a chargeable printing module.
I want customers to be able to buy 'Printing Credits' and then only be able to print if they have adequate credits.
This must work for all applications, so presumably must require some API work.
i.e. No matter what application the user is in (Word, Notepad, IE etc), when they click Print, I need to be able to either allow the print or reject it if they don't have the required credits. At this stage, I am not concerned with details such as whether or not the print job is in colour, but I must know how many pages are being printed.
Thanks in advance,