It is HOW to select the cell visually that I need.
The use selects cells/rows by moving the cursor using mouse (or arrow keys or Tab/Enter) and/or by clicking on a cell.
Visual feedback of selection state is controlled by the grid's Options property.
Particularly by including or excluding the values goRowSelect, goDrawFocusSelection, goSelectionActive, goRelaxedRowSelect.
Or are you asking about how to select a particular cell programmatically?