Accessing Printer Port

This tutorial - http://www.codeproject.com/csharp/csppleds.asp is one of the most referenced documents when it comes to interfacing with the parallel port.

If you're building new hardware I'd recommend using the serial port. Most small micros now have reasonable serial support, from experience it tends to make life just a little easier.

Thanks.
Dunno, seems that my friend just want to know how to access respective bit or pin of the port.

I vaguely remeber that I used a library called porttalk. If i recall correctly it was very easy to use, can't recall the license but it was atleast free to try (never did any real products with it though, just tested a few things).