[VS.NET2005][C#]DataGridViewに表示されるエラーアイコンを変更したい

protected override void Paint(
	System.Drawing.Graphics graphics,
	System.Drawing.Rectangle clipBounds,
	System.Drawing.Rectangle cellBounds,
	int rowIndex,
	System.Windows.Forms.DataGridViewElementStates cellState,
	object value,
	object formattedValue,
	string errorText,
	System.Windows.Forms.DataGridViewCellStyle cellStyle,
	System.Windows.Forms.DataGridViewAdvancedBorderStyle advancedBorderStyle,
	System.Windows.Forms.DataGridViewPaintParts paintParts)
{
	paintParts = (System.Windows.Forms.DataGridViewPaintParts)(paintParts - System.Windows.Forms.DataGridViewPaintParts.ErrorIcon);

	// Call the base class method to paint the default cell appearance.
	base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState,
		value, formattedValue, errorText, cellStyle,
		advancedBorderStyle, paintParts);

	if (errorText != null && errorText.TrimEnd() != "")
	{
		System.Drawing.Rectangle newRect =
			new System.Drawing.Rectangle(cellBounds.X + cellBounds.Width - 16, cellBounds.Y + 4, 12, 11);

		graphics.DrawIcon(System.Drawing.SystemIcons.Exclamation, newRect);
	}
}