Dim myconn As New OleDbConnection
myconn = New OleDbConnection("stringa corretta")
Try
myconn.Open()
Catch En As Exception
MsgBox(En.ToString)
Exit Sub
End Try
Dim MyOleCmd As OleDbCommand
Dim strSQL As String
strSQL = "SELECT * FROM tbutenti"
MyOleCmd = New OleDbCommand(strSQL, myconn)
Dim da As New OleDbDataAdapter(MyOleCmd)

-----------------------------------------------------errore e qui
'in datatable

Dim tb As New DataTable("Mytable")

'da.fill
da.Fill(tb)

---------------------------------------------------in entrambe le due righe
DataGridView1.DataSource = tb
If myconn.State <> Data.ConnectionState.Closed Then
myconn.Close()
End If

l' erorre è :
Errore 7 Necessario un riferimento all'assembly "System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" contenente l'interfaccia implementata "System.Xml.Serialization.IXmlSerializable". Aggiungerne uno al progetto. C:\Documents and Settings\utente\Desktop\taxidriver\taxi\taxi\elenc opasseggeri.vb