Thanks for the help. But i still have an additional question. Which among the software programs available nowadays is the best for parallel port interfacing?
Wich software to be used is dependend on the operating system.
On the newer operating systems the I/O handling is done by the kernel.
You will need some driver programs to acces the parallel port.
I use Visual Basic. You can access the parallel port from there. You will (as Bertus says
need another file to place into the program or Windows directory. The one that I use is inpout32 (for win 95 / 98, ME. There is an impout for XP as well. This file came with a book. This was Parallel port complete by Jan Axelson. It is well worth the cost.