Choice of Help System
WinHelp is a bit outdated and you may ask for a newer system which is a good replacer for WinHelp. Try the successor to WinHelp, HTMLHelp 1.x, which uses HTML topic files and provides an API for some programmatic access. HTMLHelp can be generated using Microsoft’s HTML Help Workshop tool, which produces a .CHM file but it’s a bit outdated too.
For the current state of play, see this article:
You may also want to take a look at „Converting WinHelp (HLP) to HTMLHelp (CHM)“: