public event EventHandler<CellPaintingEventArgs> CellPainting

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
namespace GrapeCity.Win.MultiRow.SampleCode
{
    class OwnerDrawDemo : Form
    {
        GcMultiRow gcMultiRow = new GcMultiRow();

        public OwnerDrawDemo()
        {
            this.Text = "Owner Draw Demo";

            gcMultiRow.Dock = DockStyle.Fill;

            LabelCell labelCell = new LabelCell();
            NumericUpDownCell editNumber = new NumericUpDownCell();
            editNumber.Size = new Size(150, 21);
            editNumber.Maximum = 100;
            editNumber.Minimum = 0;

            gcMultiRow.Template = Template.CreateGridTemplate(new Cell[] { labelCell, editNumber });

            gcMultiRow.Rows.Add("Value:", 30m);
            gcMultiRow.Rows.Add("Value:", 60m);
            gcMultiRow.Rows.Add("Value:", 45m);
            gcMultiRow.Rows.Add("Value:", 90m);

            gcMultiRow.CellPainting += new EventHandler<CellPaintingEventArgs>(gcMultiRow_CellPainting);

            gcMultiRow.SectionPainting += new EventHandler<SectionPaintingEventArgs>(gcMultiRow_SectionPainting);

            this.Controls.Add(gcMultiRow);
        }

        void gcMultiRow_CellPainting(object sender, CellPaintingEventArgs e)
        {
            if (e.CellIndex == 1 && e.Scope == CellScope.Row)
            {
                e.PaintBackground(e.ClipBounds);

                PaintRateBlock(e);

                e.PaintForeground(e.ClipBounds);

                e.PaintBorder(e.ClipBounds);

                // If you customize the paint logic, make sure, the Handled property should be set to true.
                e.Handled = true;
            }
        }
        private static void PaintRateBlock(CellPaintingEventArgs e)
        {
            Color color1 = Color.Red;
            Color color2 = Color.Orange;
            if (e.Selected)
            {
                color1 = Color.Blue;
                color2 = Color.SkyBlue;
            }

            decimal rate = 0m;

            if (e.Value != null)
            {
                rate = (decimal)(e.Value) / 100m;
            }

            // Calculate block size.
            int spinButtonWidth = 17;
            int blockWidth = (int)((e.ClipBounds.Width - spinButtonWidth) * rate);

            if (blockWidth > 0)
            {
                Rectangle rect = e.CellBounds;

                rect.Width = blockWidth;

                LinearGradientBrush brush = new LinearGradientBrush(rect, color1, color2, LinearGradientMode.Vertical);

                e.Graphics.FillRectangle(brush, rect);
            }
        }

        void gcMultiRow_SectionPainting(object sender, SectionPaintingEventArgs e)
        {
            if (e.RowIndex == this.gcMultiRow.NewRowIndex && e.Scope == CellScope.Row)
            {
                e.Paint(e.ClipBounds);

                StringFormat sf = new StringFormat();
                sf.Alignment = StringAlignment.Center;

                // Paint string in section face.
                e.Graphics.DrawString("Edit cell in this row to add new rows", gcMultiRow.Font, Brushes.Gray, e.SectionBounds, sf);

                // If you customize the paint logic, make sure, the Handled property should be set to true.
                e.Handled = true;
            }
        }

        [STAThreadAttribute()]
        public static void Main()
        {
            Application.EnableVisualStyles();
            Application.Run(new OwnerDrawDemo());
        }
    }
}