It appears that a distribution list is a group under address list and the AddMember method requires a GroupMemberList.

Group, GroupMember, and GroupMemberList are all in the types.xsl under gwws. However, options for gwws. when trying to Dim a GroupMemberList are only Group and GroupMember.

This appears to be a problem or maybe I missed something in the concept.

A sample of adding members might be helpful.