>I think in order for the above code to work in a grid, the checkbox control Refresh method has to fire. But when I put some "test" code in the Refresh method of the checkbox, it never fires. You see, the InteractiveChange or Click() do not work because user does not change the value. All I want is that based on whatever value is in the field to show (in grid) Yes or No. But now that I am describing it, maybe I should change the control from checkbox to textbox and - maybe - the refresh will fire in a text box.

You can try to do .checkbox.refresh() in the column.container.refresh(), see if that fires.