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# XTaskQueueDuplicateHandle

> XTaskQueueDuplicateHandle

# XTaskQueueDuplicateHandle

Duplicates a XTaskQueueHandle object.

## Syntax

```cpp theme={null}
HRESULT XTaskQueueDuplicateHandle(  
         XTaskQueueHandle queueHandle,  
         XTaskQueueHandle* duplicatedHandle  
)  
```

### Parameters

*queueHandle*   \_In\_\
Type: XTaskQueueHandle

The queue to reference.

*duplicatedHandle*   \_Out\_\
Type: XTaskQueueHandle\*

The duplicated queue handle.

### Return value

Type: HRESULT

HRESULT success or error code.

## Remarks

Use [XTaskQueueCloseHandle](/reference/system/xtaskqueue/functions/xtaskqueueclosehandle) to close the **XTaskQueueHandle** object.

The following example demonstrates how to duplicate a task queue handle. If you have long-running work, you might want to duplicate the task queue handle for the duration of that work. This prevents anyone that calls the [XTaskQueueCloseHandle](/reference/system/xtaskqueue/functions/xtaskqueueclosehandle) function from closing the queue while you still need it.

```cpp theme={null}
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);
    }
}
```

## Requirements

**Header:** XTaskQueue.h

**Library:** xgameruntime.lib

**Supported platforms:** Windows, XBOX One family consoles and XBOX Series consoles

## See also

[XTaskQueue members](/reference/system/xtaskqueue/xtaskqueue_members)\
[Asynchronous Programming Model](/build/core-features/common/async/async-programming-model)\
[Async Task Queue Design](/build/core-features/common/async/async-task-queue-design)


## Related topics

- [XblGetAsyncQueue](/reference/live/xsapi-c/xbox_live_global_c/functions/xblgetasyncqueue.md)
- [XTaskQueue](/reference/system/xtaskqueue/xtaskqueue_members.md)
- [Async task queue design](/build/core-features/common/async/async-task-queue-design.md)
- [How to: Duplicating a task queue handle](/build/core-features/common/async/async-task-queue-design-howto/duplicating-task-queue-handle.md)
- [XTaskQueueCloseHandle](/reference/system/xtaskqueue/functions/xtaskqueueclosehandle.md)