private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)

        {

            e.Layout.Override.RowSelectors = DefaultableBoolean.True;

            e.Layout.Override.RowSelectorNumberStyle = RowSelectorNumberStyle.VisibleIndex;

            e.Layout.Override.RowSelectorWidth = ;

        }