public override bool DataGridViewRowHeaderCellDrawBorder (DataGridViewRowHeaderCell cell, Graphics g, Rectangle bounds) { if (!RenderClientAreas || !cell.DataGridView.EnableHeadersVisualStyles || !VisualStyleRenderer.IsElementDefined (DataGridViewRowHeaderCellGetVisualStyleElement (cell))) return base.DataGridViewRowHeaderCellDrawBorder (cell, g, bounds); g.DrawLine (cell.GetBorderPen (), bounds.Right - 1, bounds.Top, bounds.Right - 1, bounds.Bottom - 1); return true; }