A pretty advanced tutorial. You'll need to know what interrupt calls are and how to use them. Describes and gives source code and comments on using QB with Peter Tattam's NTCPDRV TSR TCP stack for DOS. (with a packet driver of course)
You need REAL DOS for this.
i tried submitting this on the website here as a tutorial at http://www.petesqbsite.com/sections/submit/submit.shtml
but it is broken for some reason.
Pete please add it to the site if you wish.