I'm not sure the your implementation, but you can reference it by
myDataTable.Rows(myDataTable.Rows.Count-1)
This will reference the last row of a Datatable, so you'd need to reference
the Table specifically returned by your specific data adapter.
If you are using a BindingManager/BindingContext you could set the
bmb.Position = bmb.Count-1
If neither of these get you what you want, let me know the context and
hopefully I can be more helpful.
HTH,
Bill