Oh. I see what you were trying to say. The error I was having was not because GUID isn't supported, but because it was trying to interpret the data as binary while it was stored as text, thus the request failed.
I just tried creating a new table with a primary key of type 'uniqueidentifier', and adding data into it. It shows up as binary data. I also tried adding "binary guid=False" to the connection string, but this parameter doesn't have any effect. It still treats the column as binary. Etienne
