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));
    }
};

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

struct App : TopWindow {
	Array<Option> option;
	ArrayCtrl a;
	
	void Do(int ii)
	{
		option[ii].SetFocus();
		for(int i = 0; i < option.GetCount(); i++)
			option[i].Enable(i == ii || option[ii]);
	}
	
	typedef App CLASSNAME;
	
	App() {
		a.AddColumn("Option");
		for(int i = 0; i < 300; i++) {
			a.Add(i & 4);
			a.SetCtrl(i, 0, option.Add().SetLabel("Test"));
			option.Top() <<= THISBACK1(Do, i);
		}
		a.SetLineCy(Draw::GetStdFontCy() + 8);
		Add(a.SizePos());
		Sizeable();
	}
};

GUI_APP_MAIN
{
	App().Run();
}

	const int	offset	= gridctrl.GetFixedCount(),
			pos		= gridctrl.GetCursor();

	if ( atoi(gridctrl.Get("checked").ToString())==1 )
		for ( int t=0; t<gridctrl.GetCount(); t++ )
			if ( (t!=pos) && (atoi(gridctrl.Get(t+offset,"checked").ToString())==1)) {
				gridctrl.Set(t,"checked",0);
			}

Value GridCtrl::Get(int r, const char * alias)
{
	return Get0(r, aliases.Get(alias));
}