> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# XblMultiplayerAddSubscriptionLostHandler

> XblMultiplayerAddSubscriptionLostHandler

# XblMultiplayerAddSubscriptionLostHandler

注册一个事件处理程序，用于在多人游戏订阅丢失时接收通知。使用返回的 XblFunctionContext 可取消注册该处理程序。

## 语法

```cpp theme={null}
XblFunctionContext XblMultiplayerAddSubscriptionLostHandler(  
         XblContextHandle xblContext,  
         XblMultiplayerSessionSubscriptionLostHandler* handler,  
         void* context  
)  
```

### 参数

*xblContext*   \_In\_\
类型：[XblContextHandle](/reference/live/xsapi-c/types_c/handles/xblcontexthandle)

本地用户的 XBOX Live 上下文。

*handler*   \_In\_\
类型：XblMultiplayerSessionSubscriptionLostHandler\*

用于接收通知的回调函数。

*context*   \_In\_opt\_\
类型：void\*

要传递给处理程序的调用方上下文。

### 返回值

类型：XblFunctionContext

为该事件注册的函数上下文令牌。

## 要求

**头文件：** multiplayer\_c.h

**库：** Microsoft.Xbox.Services.14x.GDK.C.lib

## 另请参阅

[multiplayer\_c](/reference/live/xsapi-c/multiplayer_c/multiplayer_c_members)


## Related topics

- [从 MPSD 迁移到 PlayFab Multiplayer 和 MPA](/zh-CN/services/xbox-services/multiplayer/mpsd/concepts/live-mpsd-to-mlp.md)
- [XblMultiplayerRemoveSubscriptionLostHandler](/zh-CN/reference/live/xsapi-c/multiplayer_c/functions/xblmultiplayerremovesubscriptionlosthandler.md)
- [XblMultiplayerSessionSubscriptionLostHandler](/zh-CN/reference/live/xsapi-c/multiplayer_c/functions/xblmultiplayersessionsubscriptionlosthandler.md)
- [XblMultiplayerAddSessionChangedHandler](/zh-CN/reference/live/xsapi-c/multiplayer_c/functions/xblmultiplayeraddsessionchangedhandler.md)
- [XblMultiplayerActivityAddInviteHandler](/zh-CN/reference/live/xsapi-c/multiplayer_activity_c/functions/xblmultiplayeractivityaddinvitehandler.md)