protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            base.ProcessCmdKey(ref msg, keyData);
            int WM_KEYDOWN = 256;
            int WM_SYSKEYDOWN = 260;
            bool _disable = false;
            if (msg.Msg == WM_KEYDOWN || msg.Msg == WM_SYSKEYDOWN)
            {

                if (keyData == Keys.Enter )
                {
                    switch (dg1.CurrentCellAddress.X)
                    {
                        case 0:
                            SendKeys.Send("{Tab}");
                            SendKeys.Send("{Tab}");
                            SendKeys.Send("{Tab}");
                            SendKeys.Send("{Tab}");
                            _disable = true;
                            break;
                        case 1:
                            SendKeys.Send("{Tab}");
                            SendKeys.Send("{Tab}");
                            SendKeys.Send("{Tab}");
                            _disable = true;
                            break;
                        case 2:
                            SendKeys.Send("{Tab}");
                            SendKeys.Send("{Tab}");
                            _disable = true;
                            break;
                        case 3:
                            SendKeys.Send("{Tab}");
                            _disable = true;
                            break;
                        case 4:
                            SendKeys.Send("{Tab}");
                            _disable = true;
                            break;                                
                    }
                }
            }
            return _disable;
        }