ReFox  ^XI+  for VFP9 and all older versions 

ComPro (CZ)
Jan Brebera

home: ReFox home page
email: info@refox.net
email: jan.brebera@email.cz

you cannot open HTML Help files ...

1. Right-click the CHM file, and then click Properties.
2. Click Unblock.
3. Double-click the .chm file to open the file.

details:
http://support.microsoft.com/?kbid=902225