In the CHM Help project You must have 3 addition files in 3 sections:
[ALIAS]
#include ALIAS.H

[MAP]
#include MAP.H

[TEXT POPUPS]
input.txt
map.h

example of alias.h: (contains path to local HTML files)
IDH_OPISSYS = html\General\opis_sys.htm
IDH_TECHNICAL = html\General\technical.htm
IDH_INSTALL = html\General\install.htm
IDH_KEYBOARD = html\General\keyboard.htm
IDH_BUTTONS = html\General\buttons.htm
IDH_PRINTER = html\General\printer.htm

exaple of MAP.H: (contains numbers of Context sensitive Help in Your forms)
#define IDH_OPISSYS 2
#define IDH_TECHNICAL 3
#define IDH_INSTALL 4
#define IDH_KEYBOARD 5
#define IDH_BUTTONS 6
#define IDH_PRINTER 7


example of INPUT.TXT (I assume this file is for conection between MAP.H and ALIAS.H)
.topic IDH_OPISSYS
.topic IDH_TECHNICAL
.topic IDH_INSTALL
.topic IDH_KEYBOARD
.topic IDH_BUTTONS
.topic IDH_PRINTER


HTH
Boris