Hi, I am looking for a little help.

I have a separate system for managing club memberships. When someone wants to renew membership, I direct them to our cart (used by members and many non-members) to make the payment.

I would like to be able to connect that payment with the member's renewal. I figure the easiest approach would be to pass the member's ID number in the membership system to the cart in the redirection, and then load it as an attribute value.

My question is: Is it possible to pass a variable to Zen Cart when it is initiated from another program, and if so, what is the best method to use?

[I've spent a few hours searching for an answer here, and while there are some postings on this, I could not find a definite answer, or method.]

Any help greatly appreciated!