Id PRIMARY_KEY("PRIMARY_KEY"); // possibly global, "Id constant"
....
AddIndex(PRIMARY_KEY, "id");

3.a) I need to SOMETIMES assign a callback to the option column that will uncheck all other options (like a radio ctrl), other times multiple selections are OK.  I can do this if I can reliably figure out in which row the option that triggered the callback resides (I need people to be able to select via mouse or keyboard).

3.b) In some cases I may want one option completely disabled (in other words one row disabled).  However, I still need the row to list.  In these cases removing the option ctrl is acceptable.

struct MyDialog {
    Array<Option> option;

    void OptionColumn(Ptr<Ctrl>& ctrl, int index)
    {
        ctrl = &option.At(index);
    }

    MyDialog() {
        list.AddColumn("Options").Ctrls(THISBACK(OptionColumn));
    }
};