public ref class Caller
{
private:
    Timer mTimer;
    static void timerCb(Object ^ state);

    Caller::Caller()
    {
        mTimer = gcnew Timer(gcnew TimerCallback(timerCb));
    }

    void Caller::timerCb(Object ^ state) { }
}

// Error    C2582   'operator =' function is unavailable in 'System::Threading::Timer'