I'm using the Office Toolkit interface to submit a SOQL query like this:

strQuery = string.Format(

    "SELECT Id, Owner.Extension, LastActivityDate, CreatedDate FROM Contact WHERE "+

    "Phone LIKE \'{0}\' OR OtherPhone LIKE \'{0}\' OR MobilePhone LIKE \'{0}\'", strNumber);

QueryResultSet4 result = SFSession.Query(strQuery, false);

It works fine, finds the expected record and I can access the Id, LastActivityDate adn the CreatedDate field values by enumerating the fields collection of the QueryResultSet4.  What I can't figure out is how to extract the presumably returned Owner.Extension field.  I think that part of the query is working as if I change it then the query fails.  I just can't figure out how I'm supposed to get at the data for the field...???

Thanks!