HRESULT XTaskQueueDuplicateHandle(  
         XTaskQueueHandle queueHandle,  
         XTaskQueueHandle* duplicatedHandle  
)  

void DuplicatingTaskQueueHandle()
{
    XTaskQueueHandle queue;

    HRESULT hr = XTaskQueueCreate(
        XTaskQueueDispatchMode::Manual, 
        XTaskQueueDispatchMode::Manual, 
        &queue);

    if (FAILED(hr))
    {
        printf("failed to create task queue: 0x%x\r\n", hr);
        return;
    }

    class LongRunningWork
    {
    public:
        HRESULT Initialize(XTaskQueueHandle queue)
        {
            return XTaskQueueDuplicateHandle(queue, &m_queue);
        }
        
        ~LongRunningWork()
        {
            if (m_queue != nullptr)
            {
                XTaskQueueCloseHandle(m_queue);
            }
        }

    private:
        XTaskQueueHandle m_queue = nullptr;
    };

    LongRunningWork work;
    hr = work.Initialize(queue);
    
    // Note that LongRunningWork's queue handle is still valid.
    XTaskQueueCloseHandle(queue);

    if (FAILED(hr))
    {
        printf("Failed to duplicate queue handle: 0x%x\r\n", hr);
    }
}