Assembly in Qbasic by Anonymous101.
A simple example of how to use assembly code in qbasic, describing how to use the mouse in QB though asm code.
Parallel port control in QB by Anonymous101.
A very simple example of how to use the parallel port to monitor and control real-world devices (NOT printers).
Using the IBM PC's Cassette/Tape port in DOS by Anonymous101.
Although not yet about programming, this page contains a download and instructions to use the 5150's cassette port
Using TCP/IP in qbasic by Anonymous101.
How to use TCP/IP from qbasic to connect to an IRC server
Quick Basic 4.5 Graphics. Tutorial #1 - The basics by harshbarj.
Intoduction to graphis in Quick Basic 4.5 (also works in Qbasic)