C#, baza podataka, mp3 katalog

Code:

private void PopuniListu()
{
            InitializeComponent();
            string conStr = "data source=mp3katalog";
            SQLiteConnection conn = new SQLiteConnection(conStr);
            SQLiteCommand addToList = new SQLiteCommand();

            using (conn)
            {
                  conn.Open();
                  string commandString = "SELECT naziv FROM katalog";
                  dodaj.Connection = conn;
                  dodaj.CommandText = commandString;

                  using (SQLiteDataReader dr = dodaj.ExecuteReader())
                  {
                      while (dr.Read())
                      {
                          object nazivPesme = dr["naziv"];
                          lbSpisak.Items.Add(nazivPesme.ToString());
                      }
                  }
            }
}

Code:

void cbPretraga_MouseWheel(object sender, MouseEventArgs e)
        {
           ((HandledMouseEventArgs)e).Handled = true;
       }