private void DgDr_KeyDown(object sender, KeyEventArgs e)
        {
            try
            {

                if (DgDr.CurrentRow != null)
                {
                    int GId = DgDr.CurrentRow.Cells["ColParticularDrGId"].EditedFormattedValue.ToString().IntParse();
                    int AId = DgDr.CurrentRow.Cells["ColParticularDrAId"].EditedFormattedValue.ToString().IntParse();

                    if (e.KeyData == Keys.Enter)
                    {
                        e.SuppressKeyPress = true;
                        e.Handled = true;

                        //if (AId != 0)
                        //{
                        //    clsGeneral.Accounting_Main.OpMonthlySummary(AId, dateTimePicker1.Value, this);
                        //}
                        //else
                        //{
                        //    clsGeneral.Accounting_Main.OpgroupSummary(GId, dateTimePicker1.Value, this);
                        //}
                    }
                    if (e.KeyData == Keys.Space)
                    {
                        e.SuppressKeyPress = true;
                        e.Handled = true;

                        DataGridViewCellStyle CompStyle1 = new DataGridViewCellStyle();
                        CompStyle1.ForeColor = Color.Red;
                        CompStyle1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

                        DataGridViewCellStyle CompStyle2 = new DataGridViewCellStyle();
                        CompStyle2.ForeColor = Color.Black;
                        CompStyle2.Font = new System.Drawing.Font("Tahoma", 9.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

                        if (DgDr.CurrentRow.DefaultCellStyle.ToString() == CompStyle1.ToString() || DgDr.CurrentRow.DefaultCellStyle.ToString() == CompStyle2.ToString())
                        {
                            int Index = DgDr.CurrentRow.Index;
                            for (int i = Index + 1; i < DgDr.Rows.Count; i++)
                            {
                                int GCId = DgDr.Rows[i].Cells["ColParticularDrGId"].EditedFormattedValue.ToString().IntParse();
                                if (GId == GCId)
                                {
                                    DgDr.Rows[i].Visible = !DgDr.Rows[i].Visible;
                                }
                            }
                            DgDr.Refresh();
                        }
                    }
                }
            }
            catch (Exception Erp)
            {
                clsGeneral.ShowErrMsg(Erp.Message);
            }
        }