A pointer to a help structure is passed to the event functions in the HELPETP event table. The help structure's first three members are identical to the key control structure—a structure tag, a pointer to a window, and an action code. Additional members in the help structure are the keyword for the part of the help memory file currently being displayed and a pointer to the next help structure.
The tag member of the help structure is initialized to HELP_TAG. The window pointed to in the help structure is the help window and is set to be associated with the help memory file. From this structure member, you have access to the help window and the help memory file.
Because the first three members of the structure are the same as the key control structure, the viewing event functions ("kv" event functions) can be and are used to view the memory file within the window.
The action code value is used internally. To achieve the same effect as setting the action code, call the event functions available for the viewing and help event tables, VIEWETP and HELPETP.
