There is such a thing as having a word document with bookmarks for your various topics and then having each form have a help button that can call a routine to open a Word document in read-only mode and tell it, once opened, to do a .GoToBookmark (and of course, name the bookmark.) Don't need a .HLP or other file type.
The old style of help operation with separately compiled .HLP or .HLB files hasn't been supported very will in a while, perhaps precisely because bookmarking can be so useful.
Just as a thought to consider how far you could take this, you can define certain controls to accept a right-click as a help call. That would allow you have help topics down to individual control levels, and these right-click event routines could each have their own individual bookmarks in the Word document if you wanted to take it that far.
In such calls, it might be a single line for each click event, where the line is to call some common subroutine with a single text argument that is the named bookmark. You would have to look up manipulation of word application objects to:
1. Create the word app object
2. Using the object, open the help document in read-only mode
3. With the open document, do a "Go To Bookmark" for the supplied text
4. You might have to play with some windows calls to force the document to the top (bring it to the front)
5. When your user is done reading, they can close that window, which closes the file but doesn't close the Word App Object
6. Just be sure to remember to close the Word App Object when you close your Access application.