>I know using udts in class interfaces is not possible,
>what is the best workaround to this?
>
>thanx,
>benj

Probably an XML string can do the trick. The downside to that is the parsing, you need to use MSXML parser in your implementation.

Another possibility is the use of an ADO recordset.

Both of these approaches should work well even if these classes are intended as COM servers.