C#

public frmMainForm()
        {
            InitializeComponent();
            string sConnection = "Provider = Microsoft.Jet.OLEDB.4.0;" + "Data Source = Schedule.mdb";

            using (OleDbConnection dbConnect = new OleDbConnection(sConnection))
            {
                dbConnect.Open();

                if (prog == "CS")
                {
                    string sqlString = "SELECT cs_firstcourse, cs_secondcourse, cs_thirdcourse, cs_fourthcourse, cs_fifthcourse, cs_sixthcourse, cs_seventhcourse, cs_eighthcourse, cs_ninthcourse FROM CS WHERE cs_year = @chosenYear AND cs_term = @chosenTerm;";

                    OleDbCommand dbCmd = new OleDbCommand();
                    dbCmd.CommandText = sqlString;
                    dbCmd.Connection = dbConnect;
                    dbCmd.Parameters.AddWithValue("chosenYear", chosenYear);
                    dbCmd.Parameters.AddWithValue("chosenTerm", choseTerm);

                    using (OleDbDataReader dbReader = dbCmd.ExecuteReader())
                    {
                        if (dbReader.Read() == true)
                        {
                            for (int a = 0; a < 9; a++)
                            {
                                lstBoxCourses.Items.Add(dbReader[a].ToString());
                            }
                        }
                        else
                        {
                            MessageBox.Show("An error has occured while trying to retrieve data from the database", "Class Scheduling: Database Access Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                        }
                        dbReader.Close();
                    }
                }
                dbConnect.Close();
            }
        }