How to create a virtual printer in Windows?
When I did it (which about 12 years ago) I started with the postscript driver sample, replaced all the postscript-specific stuff (in my case, to write to a bitmap instead of generating postscript commands).
I also wrote a custom print monitor (the driver writes to the spooler, which write to a monitor): my monitor wrote to a file instead of e.g. to the parallel port.
However, printer driver architecture and/or the set of sample drivers may have changed since then.
You can look to the 'minidriver' development in the from Microsoft (Microsoft MDT), that might help depending on your exact needs. If the port you need to deal with (ie: you are going to take the data from an existing printer driver and want to process) you could look to the source code for RedMon. It doesn't support Vista/Win7 but might point you in the right direction.
This book maybe help you Developing Drivers with the Windows® Driver Foundation
A list of my links
- http://www.codeproject.com/KB/system/driverdev.aspx
- http://www.microsoft.com/whdc/ddk/winddk.mspx
- http://jungo.com/wdusb.html
- https://web.archive.org/web/20130717135254/https://msdn.microsoft.com/en-us/library/ff554651.aspx
- http://channel9.msdn.com/posts/Rory/Driver-Development-and-Much-More-With-Mike-Calligaro/