Method to get mvlink buscomp

I am trying to retrieve a record of a certain BC but I wont to loop through records of a MVField. I am wondering if there is an escript method to get a link buscomp. If yes then I could probably use next record to change the focus of the link. Then the next time that I retrieve the BC record, the MVField will be pointing to a different record.

For example, lets say I have the BC Account with a record with SN = 12345. This BC has a link to Contacts and the 12345 account has 3 contacts. The Account has a Contact Name MVField. Lets say that the list would have Contact1, Contact2, Contact3. What I am trying to do is first get the account: SN = 12345, Contact Name = Contact1. Then get the link buscomp, proceed to next record. Then next time I retrieve the account I get: SN = 12345, Contact Name = Contact2.