setfunhelp
(setfunhelp function topic file)
The setfunhelp function sets a help topic belonging to a function.
Arguments
function specifies a string containing the name of a user-defined Lisp function ("C:NAME"). Make sure to include the C: prefix.
topic specifies a string containing the help topic.
file specifies a string containing the name of the help file (optional).
Return Value
If the function succeeds, it returns the value of function argument; otherwise, it returns nil.
: (setfunhelp "C:MYFUNC" "Welcome" "chmfile_name")
"MYFUNC"
(setfunhelp "c:mycmd" "Using MyCmd" "D:\\Program Files\\Company_Folder_Name\\Product_Folder_Name\\Help\\chm_file_name")