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  string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +
                                    System.Threading.Thread.GetDomain().BaseDirectory + "test.mdb";

            string query = "SELECT * FROM Test";

            dAdapter = new OleDbDataAdapter(query, connString);

            OleDbCommandBuilder cBuilder = new OleDbCommandBuilder(dAdapter);

            dTable = new DataTable();

            dAdapter.Fill(dTable);

            BindingSource bSource = new BindingSource();

            bSource.DataSource = dTable;

            dataGridView1.DataSource = bSource;					

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dAdapter.Update(dTable);