ArrayCtrl lst_layers;

void MakeOption(One<Ctrl> & res)
{
   res.Create<Option>();
}


SomeConstructor() {
 lst_layers.AddColumn(t_("Layer"));
 lst_layers.AddIndex();
 lst_layers.AddColumn().Ctrls(&MakeOption);
 lst_layers.WhenCtrlsAction = THISBACK(MapLayerChecked);
}

void MapLayerChecked()
{
	Option *o = (Option *)lst_layers.GetActiveCtrl();
}