public class GridChangedEventArgs : System.EventArgs 

private void Form1_Load(object sender, EventArgs e)
{
            _flex = new C1FlexGrid();
            _flex.Bounds = new System.Drawing.Rectangle(50, 50, 700, 600);
            this.Controls.Add(_flex);
            OleDbConnection con = new OleDbConnection("provider=microsoft.jet.oledb.4.0;Data Source=" + Environment.GetFolderPath(Environment.SpecialFolder.Personal) + "\\ComponentOne Samples\\Common\\C1NWind.mdb");
            DataTable productsTable = new DataTable();
            new OleDbDataAdapter("Select * from Products order by CategoryID", con).Fill(productsTable);
            _flex.DataSource = productsTable;

            _flex.GridChanged += _flex_GridChanged;
}

private void _flex_GridChanged(object sender, GridChangedEventArgs e)
{
            //Track the type of change that occured in the grid when the GridChanged event was fired.
            gridChangesListBox.Items.Add(e.GridChangedType);
}