How to send raw data to IEEE-1284 Parallel Printer Cable?
The basic "Centronics" printer port protocol uses a simple 2-wire handshake in which the PC asserts a strobe signal until the printer asserts an acknowledge signal. This repeats for each byte transferred.

If you want to "bit-bang" individual pins on the parallel port, you can't use the Windows printer drivers; you need to access the hardware at a lower level. If you're using a USB-to-parallel converter, you'll have to read its documentation.