<Listbox Selected="{Binding OnSelected}" ItemsSource="{Binding TheList2}" ItemTemplate="{StaticResource ListTemplate2}"/>

class ViewModel_imports : public BaseComponent{
public:
  ViewModel_imports() {
    mListBoxItems = *new ObservableCollection<Item_model>;
    cmd_on_selected = *new DelegateCommand(MakeDelegate(this, &ViewModel_imports::OnSelected));
  }
  Noesis::Ptr<ObservableCollection<Item_model> > mListBoxItems;
  void OnSelected(BaseComponent* sender) {}
private:
  Noesis::Ptr<DelegateCommand> cmd_on_selected ;	
  DelegateCommand* get_cmd_on_selected() const { return cmd_on_selected .GetPtr(); };
  NS_IMPLEMENT_INLINE_REFLECTION(ViewModel_imports, BaseComponent) {
    NsMeta<TypeId>("ViewModel2");
    NsProp("TheList2", &ViewModel_imports::mListBoxItems);
    NsProp("OnSelected", &ViewModel_imports::get_cmd_on_selected);
  }
};

<Listbox SelectedItem="{Binding TheSelectedItem}" ItemsSource="{Binding TheList2}" ItemTemplate="{StaticResource ListTemplate2}"/>

class ViewModel_imports : public BaseComponent {
public:
  // ...
  BaseComponent* GetTheSelectedItem() const {
    return mTheSelectedItem.GetPtr();
  }
  void SetTheSelectedItem(BaseComponent* item) {
    if (mTheSelectedItem != item) {
      mTheSelectedItem.Reset(item);
      OnSelectedItemChanged();
    }
  }
  void OnSelectedItemChanged() {
    // do whatever you need on selected item change
  }
  //...
  NS_IMPLEMENT_INLINE_REFLECTION(ViewModel_imports, BaseComponent) {
    NsMeta<TypeId>("ViewModel2");
    NsProp("TheList2", &ViewModel_imports::mListBoxItems);
    NsProp("TheSelectedItem", &ViewModel_imports::GetTheSelectedItem, &ViewModel_imports::SetTheSelectedItem);
  }
};