Sandra,

>I have tried unsucessfully to use the example code in the MM help files for batch updating the Regions table using the mmUltraWebGrid. I get
>the System.NullReferenceException on
>e.Row.Cells.FromKey("GUID").Value = dr["GUID"];
>
>Has anyone else been able to use the GUID column that Kevin demonstrates?
>
>Does anyone have some working MM code for updating, adding, deleting from a web grid with the new Infragistics Version 5.1? I am willing to use a typed dataset, and I have tables that autoincrement primary keys.

Are you sure there is a value in dr["GUID"]? I recommend storing the value to a local variable and examining it in the Watch Window.

Regards,