string dbPath = System.IO.Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName)+@"\mdb.mdb";
            ADODB.Connection conn = new ADODB.Connection();
            string connstr="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+dbPath;
            string sql = "select * from test where ID=2";
            conn.Open(connstr, "", "",-1);
            ADODB.Recordset rs = new ADODB.Recordset();
            rs.Open(sql, conn, ADODB.CursorTypeEnum.adOpenForwardOnly, ADODB.LockTypeEnum.adLockReadOnly, 1);
            if (!rs.EOF)
            {
                MessageBox.Show(rs.Fields[2].Value.ToString());
            }
            rs.Close();
            conn.Close();