User requests help at dialog or window in application.
Application passes in HTML Help file (.CHM) and Map Number. These components go through a translation process in application and in HTML Help engine (HHCTRL.OCX).
HTML Help Translator converts Map Number into Topic ID. It uses Map File containing Topic IDs and matching Map Numbers.
HTML Help Translator uses Alias List to convert Topic ID into Topic File Name.
Alias enables Topic ID to map to specific file name (.HTM topic file). Authors create Aliases for Topic IDs in RoboHELP and compile Help project so they are included in .CHM file.
HTML Help engine displays .HTM file in window.