I'm better equipped to help you with ASP objects within VFP, but, it's pretty much the same simple principle.
Add a variable to a session:
oSession.VALUE("lnNum")=20
Retrieve:
IF oSession.VALUE("lnNum") > 10
do something ...
ENDIF

These session variables are good for as long as the user has the browser open and can last as long as 1 day ( anything older, use a cookie)
>Just straight ASP...
>
>Kevin