Creating a Hypertext Help System for a GUI-Based Client/Server Application 
We are currently in the second phase of development of a large Windows online help system. This paper reviews the major decisions we had to make during the first phase of the project, and lists some project evaluation results that have helped us plan for subsequent phases.
Asher, Betsy, David E. Lasecke and John Wenstrom. STC Proceedings (1994). Articles>Documentation>Online>Help