<Canvas DataContext="{StaticResource ViewModel_dc_cursor}">
  <Canvas.Resources>
    <ViewModel_cursor x:Name="ViewModel_dc_cursor"/>
  </Canvas.Resources>
  <Image Source="..\icons\cursor_arrow.png" Width="16" Height="25"
              Canvas.Left="{Binding pos_x, Mode=TwoWay}" Canvas.Top="{Binding pos_y, Mode=TwoWay}"/>
</Canvas>

class ViewModel_cursor : public Canvas {
public:
    ViewModel_cursor();
    virtual void update(NsInt x, NsInt y) {
        pos_x = x;
        pos_y = y;
    };
private:
    NsInt pos_x, pos_y;
    NS_IMPLEMENT_INLINE_REFLECTION(ViewModel_cursor, Canvas) {
        NsMeta<TypeId>("ViewModel_cursor");
        NsProp("pos_x", &ViewModel_cursor::pos_x);
        NsProp("pos_y", &ViewModel_cursor::pos_y);
    }
};

extern "C" NS_DLL_EXPORT void NsRegisterReflection(Noesis::ComponentFactory* factory, NsBool registerComponents) {
    NS_REGISTER_COMPONENT(ViewModel_cursor);
} 

"__sSymbolpos_x" undeclaired identifier

class Cursor : public BaseComponent, public INotifyPropertyChanged {
public:
    Cursor();
    PropertyChangedEventHandler& PropertyChanged() {
        return _propertyChanged;
    }
    void set_x(NsInt x) {
        pos_x = x;
        _propertyChanged(this, NSS(pos_x));
    }
    NsInt get_x() {
        return pos_x;
    }
    void set_y(NsInt y) {
        pos_y = y;
        _propertyChanged(this, NSS(pos_y));
    }
    NsInt get_y() {
        return pos_y;
    }

private:
    NsInt pos_x, pos_y;
    PropertyChangedEventHandler  _propertyChanged;
    NS_IMPLEMENT_INLINE_REFLECTION(Cursor, BaseComponent) {
        NsMeta<TypeId>("Cursor");
        NsImpl<INotifyPropertyChanged>();
        NsProp("pos_x", &Cursor::get_x, &Cursor::set_x);
        NsProp("pos_y", &Cursor::get_y, &Cursor::set_y);
    }
};

NS_DECLARE_SYMBOL(pos_x);
NS_DECLARE_SYMBOL(pos_y);

   
NsInt get_x() const {
      return pos_x;
}
NsInt get_y() const {
        return pos_y;
}