' creo una riga fittizia
        Dim Dt As New System.Data.DataTable()
        Dt.Columns.Add("CampoDaCollegare")
        Dim DR As System.Data.DataRow = Dt.NewRow()
        DR("CampoDaCollegare") = "PROVA"
        Dt.Rows.Add(DR)

        GridView1.AutoGenerateColumns = False

        ' colonna collegata alla sorgente (presa in questo caso dal datatable)
        Dim ColonnaDaTabella As New BoundField()
        ColonnaDaTabella.DataField = "CampoDaCollegare"
        ColonnaDaTabella.HeaderText = "Colonna collegata"
        ColonnaDaTabella.Visible = True
        GridView1.Columns.Add(ColonnaDaTabella)

        ' colonna bottone
        Dim ColonnaBottone As New ButtonField()
        ColonnaBottone.ButtonType = ButtonType.Image
        ColonnaBottone.ImageUrl = "http://www.google.it/intl/it_it/images/logo.gif"
        ColonnaBottone.HeaderText = "Immagine"
        ColonnaBottone.Visible = True
        GridView1.Columns.Add(ColonnaBottone)

        GridView1.DataSource = Dt
        GridView1.DataBind()