"General" tab in sb IDE; "add/remove" then "help url."

This is where I identify the help file that is available in Windows Control
Panel Add/Remove Programs. It has to be a file ON THE DESTINATION COMPUTER.
I want to name it "%_SB_INSTALLDIR%\myprogram.chm". However, that is not
translated to an actual path at runtime. If I enter only "myprogram.chm"
then Windows still does nothing because it does not understand the PATH to
my help file. [On the other hand, the "Product URL" field DOES work because
Windows understands the "http://" portion.]

What should I put into the "help URL" field so that Add/Remove Programs will
find the path to my application's help file?
--
Kent V. Busse, J.D.
A:COMPUTER.WIZ
Outsourcing for results!