C++ Properties

class Tree
{
private:
    int m_x;
public:
    __declspec(property(put = property__set_x, get = property__get_x)) int X;

    int property__get_x()
    {
        return m_x;
    }
    void property__set_y(const int& value)
    {
        m_x = value;
    }
}