When I tried to hook up the new Help file to Behold, I found that the Help tools in the version of Delphi I have do not work with the CHM help format. I would have to upgrade to the latest version of Delphi, and I am not ready to do that yet.
So I needed to look for a workaround. EC Software, who produce Help and Manual - a program to create help files, make a Delphi component EC Software Help Suite (EHS) available for free. The part of it I need is the THelpRouter component, which bridges the calls in my program from WinHelp to HTML Help. It only took a few hours to install it and get it all working.