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# XblMultiplayerActivityGetActivityResultSize

> XblMultiplayerActivityGetActivityResultSize

Gets the buffer size needed to store the results of a get activity call.

## Syntax

```cpp theme={null}
HRESULT XblMultiplayerActivityGetActivityResultSize(  
         XAsyncBlock* async,  
         size_t* resultSizeInBytes  
)  
```

### Parameters

*async*   \_In\_\
Type: XAsyncBlock\*

The `XAsyncBlock` for this operation.

*resultSizeInBytes*   \_Out\_\
Type: size\_t\*

The size in bytes for the result buffer.

### Return value

Type: HRESULT

HRESULT return code for this API operation.

## Remarks

To see how this function is used, see "Getting activities" in the [Activities](https://docs.xbox.com/services/xbox-services/multiplayer/mpa/how-to/live-mpa-client-how-to.md#activities) section of [Example code for Multiplayer Activity](https://docs.xbox.com/services/xbox-services/multiplayer/mpa/how-to/live-mpa-client-how-to.md). \
\
 For more information about multiplayer activities, see [Activities](https://docs.xbox.com/services/xbox-services/multiplayer/mpa/concepts/live-mpa-activities.md).

## Requirements

**Header:** multiplayer\_activity\_c.h

**Library:** Microsoft.Xbox.Services.142.C.lib or Microsoft.Xbox.Services.143.C.lib

## See also

[multiplayer\_activity\_c](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_activity_c/multiplayer_activity_c_members.md)\
[XblMultiplayerActivityGetActivityAsync](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_activity_c/functions/xblmultiplayeractivitygetactivityasync.md)\
[XblMultiplayerActivityGetActivityResult](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_activity_c/functions/xblmultiplayeractivitygetactivityresult.md)


## Related topics

- [XblMultiplayerActivityGetActivityResult](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_activity_c/functions/xblmultiplayeractivitygetactivityresult.md)
- [XblMultiplayerActivityGetActivityAsync](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_activity_c/functions/xblmultiplayeractivitygetactivityasync.md)
- [Example code for Multiplayer Activity](https://docs.xbox.com/services/xbox-services/multiplayer/mpa/how-to/live-mpa-client-how-to.md)
- [multiplayer_activity_c (contents)](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_activity_c/multiplayer_activity_c_members.md)
- [Moving from MPSD to PlayFab Multiplayer and MPA](https://docs.xbox.com/services/xbox-services/multiplayer/mpsd/concepts/live-mpsd-to-mlp.md)