private void reCreateSumBoxes()
        {
            ReadOnlyTextBox sumBox;

            foreach (Control control in sumBoxHash.Values)
            {
                this.Controls.Remove(control);
            }
            sumBoxHash.Clear();

            int iCnt = 0;

            List <DataGridViewColumn> sortedColumns = SortedColumns;

            foreach (DataGridViewColumn dgvColumn in sortedColumns)
            {
                sumBox = new ReadOnlyTextBox();
                if (!sumBoxHash.ContainsKey(dgvColumn))
                {
                    sumBoxHash.Add(dgvColumn, sumBox);
                }

                sumBox.Top         = 0;
                sumBox.Height      = dgv.RowTemplate.Height;
                sumBox.BorderColor = dgv.GridColor;
                sumBox.TextAlign   = TextHelper.TranslateGridColumnAligment(dgvColumn.DataGridView.DefaultCellStyle.Alignment);
                sumBox.Font        = dgvColumn.DataGridView.DefaultCellStyle.Font;
                sumBox.TabStop     = false;
                if (summaryRowBackColor == null)
                {
                    sumBox.BackColor = dgvColumn.DefaultCellStyle.BackColor;
                }
                else
                {
                    sumBox.BackColor = summaryRowBackColor;
                }
                sumBox.BringToFront();

                if (dgv.ColumnCount - iCnt == 1)
                {
                    sumBox.IsLastColumn = true;
                }

                sumBox.BringToFront();
                this.Controls.Add(sumBox);

                iCnt++;
            }

            if (dgv.DisplaySumRowHeader)
            {
                sumRowHeaderLabel.Font      = new Font(dgv.DefaultCellStyle.Font, dgv.SumRowHeaderTextBold ? FontStyle.Bold : FontStyle.Regular);
                sumRowHeaderLabel.Anchor    = AnchorStyles.Left;
                sumRowHeaderLabel.TextAlign = ContentAlignment.MiddleLeft;
                sumRowHeaderLabel.Height    = sumRowHeaderLabel.Font.Height;
                sumRowHeaderLabel.Top       = Convert.ToInt32(Convert.ToDouble(this.InitialHeight - sumRowHeaderLabel.Height) / 2F);
                sumRowHeaderLabel.Text      = dgv.SumRowHeaderText;

                sumRowHeaderLabel.ForeColor = dgv.DefaultCellStyle.ForeColor;
                sumRowHeaderLabel.Margin    = new Padding(0);
                sumRowHeaderLabel.Padding   = new Padding(0);

                this.Controls.Add(sumRowHeaderLabel);
            }
            resizeSumBoxes();
        }