Classe TableLayoutCellPaintEventArgs

publicclass DemoTableLayoutPanel : TableLayoutPanel
{
	protectedoverridevoid OnCellPaint(TableLayoutCellPaintEventArgs e)
	{
		base.OnCellPaint(e);

        Control c = this.GetControlFromPosition(e.Column, e.Row);

        if ( c != null )
        {
            Graphics g = e.Graphics;

            g.DrawRectangle(
				Pens.Red, 
				e.CellBounds.Location.X+1,
				e.CellBounds.Location.Y + 1,
				e.CellBounds.Width - 2, e.CellBounds.Height - 2);

			g.FillRectangle(
				Brushes.Blue, 
				e.CellBounds.Location.X + 1, 
				e.CellBounds.Location.Y + 1, 
				e.CellBounds.Width - 2, 
				e.CellBounds.Height - 2);
        };
	}

}