Links are the heart of a hypertext system, and HTML Help gives you plenty of flexibility. In addition to links between topics in a single .chm file, there are several options for creating links between .chm files.
Even more interesting are links that point to multiple topics, or "one to many" links. When clicked, these links use the HTML Help ActiveX control to display either a Topics Found dialog box or a pop-up menu containing a list of topics.
Click here to see an example using the pop-up menu, or click here to see an example of the Topics Found dialog box.