Say I have two websites with some relationship each other. When a user log
in the current site he/she is visiting, I want to auto login the user into
the other site. Suppose the user have userid/password for the current site
and remoteuserid/remotepassword for the other site. I use session variables
to store the login information.

How do you handle this situation?

If I use Winhttp or ASPHttp, they cann't remain the login information in the
session variables.