protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)

        {

            base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, null, null, errorText, cellStyle, advancedBorderStyle, paintParts);

            bool selected = base.Selected;

            if ((cellState | DataGridViewElementStates.Selected) == cellState)

            {

                selected = true;

            }

            Image img = GetRtfImage(rowIndex, value, selected);//base.Selected

            if (img != null)

                graphics.DrawImage(img, cellBounds.Left, cellBounds.Top);

        }