Avoid activate a new CurrentCell in selection changing event

In grid control, the user selects a rectangle of cells by highlighting, and then clicks a cell inside it and change the value. Now the clicked cell is activated and highlighted but the former selected rectangle lose highlighting. So how can keep the selected rectangle highlighted while a cell within it is editing?

Try setting this property. this.grid.Model.Options.SelectCellsMouseButtonsMask = MouseButtons.Left;