How to convert GeoPolygon data type?

Hi All, I use Sql Editor and CLI to access an IUS server on Unix from a NT work station. I found that I couldn't retrieve data from a field defined as Geopolygon, which is created using Informix GeoBlade. I understand that this problem is resulted from the fact that Geopolygon is a data type not supported by CLI. My question is whether there's a way to get around, or, how to deal with user defined data types when CLI is used to connect to the database. Is there any convertion function available? Thanks. WL