Thank you Plamen,

I'll try it out, I thought I have to use this:

Dim ds As DataView

>No, you do not need to change or remove your DataSet. Just bind DataGrid to the DataView of the table. If now you have:
>

>DataGrid1.DataSource = DataSet1.Tables(0)
>

>you must change this to:
>

>DataSet1.Tables(0).DefaultView.AllowNew = False
>DataGrid1.DataSource = DataSet1.Tables(0).DefaultView
>