🚀 go-pugleaf

Hi,
I have developed an application with Borland 6 which so far has 
mostly been used on Windows XP. I have created a .HLP WinHelp 
file which so far has been fine.  As more users are now getting 
Vista and WinHelp is not supported on Vista (unless a user 
specifically downloads it)  I now need to change my help file 
format.
I have been searching archives and trying to understand what to 
do, but now feel more confused than when I started.  I am 
unclear whether .chm files are supported under Vista and 
whether .chm is the same as HtmlHelp?
I cannot afford to buy a help authoring system such as Help and 
Manual, so I have tried HelpMaker by vizacc. I have 
successfully created a help file but do not know how to call it 
from my application and specifically how to invoke it with a 
specific page showing.  This however could be academic if it is 
not sensible to move to .chm
I would appreciate any help on this.
Thanks, JB