> ## Documentation Index
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# XblMultiplayerEventArgsMembersCount

> XblMultiplayerEventArgsMembersCount

Retrieves additional information for `XblMultiplayerEventType::MemberJoined` and `XblMultiplayerEventType::MemberLeft` events.

## Syntax

```cpp theme={null}
HRESULT XblMultiplayerEventArgsMembersCount(  
         XblMultiplayerEventArgsHandle argsHandle,  
         size_t* memberCount  
)  
```

### Parameters

*argsHandle*   \_In\_\
Type: [XblMultiplayerEventArgsHandle](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/handles/xblmultiplayereventargshandle.md)

The event arguments handle for the multiplayer event.

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

The size of the `members` caller-allocated array for [XblMultiplayerEventArgsMembers](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmembers.md).

### Return value

Type: HRESULT

HRESULT return code for this API operation.

## Remarks

Call this function before you call the [XblMultiplayerEventArgsMembers](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmembers.md) function, to return the size of the array you must allocate for the `members` parameter of the [XblMultiplayerEventArgsMembers](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmembers.md) function. \
The event arguments handle for a multiplayer event can be retrieved from the `EventArgsHandle` member of the [XblMultiplayerEvent](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/structs/xblmultiplayerevent.md) structure for that multiplayer event.  \
For more information about multiplayer events, see [Multiplayer Manager API overview](https://docs.xbox.com/services/xbox-services/multiplayer/mpm/concepts/live-multiplayer-manager-api-overview.md).

## Requirements

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

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

## See also

[multiplayer\_manager\_c](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/multiplayer_manager_c_members.md)\
[XblMultiplayerEventArgsFindMatchCompleted](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsfindmatchcompleted.md)\
[XblMultiplayerEventArgsMember](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmember.md)\
[XblMultiplayerEventArgsMembers](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmembers.md)\
[XblMultiplayerEventArgsPerformQosMeasurements](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsperformqosmeasurements.md)\
[XblMultiplayerEventArgsPropertiesJson](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargspropertiesjson.md)\
[XblMultiplayerEventArgsXuid](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsxuid.md)\
[XblMultiplayerEventType](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/enums/xblmultiplayereventtype.md)


## Related topics

- [XblMultiplayerEventArgsMember](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmember.md)
- [XblMultiplayerEventArgsMembers](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsmembers.md)
- [XblMultiplayerEventArgsHandle](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/handles/xblmultiplayereventargshandle.md)
- [XblMultiplayerEventArgsXuid](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargsxuid.md)
- [XblMultiplayerEventArgsPropertiesJson](https://docs.xbox.com/reference/live/xsapi-c/multiplayer_manager_c/functions/xblmultiplayereventargspropertiesjson.md)