# 自定义通知回调类
**示例代码**
继承Huawei::Idea::IEventHandler，参见IEventHandler.h
IShareServiceController.h
```
#include "IShareServiceController.h"   
#include "IdeaShareDef.h"   
   
class IDEA_SHARE_API IShareEventHandler : public Huawei::Idea::IEventHandler{   
public:   
    ~IShareEventHandler();   
    void OnError(ShareAppErr errorCode, std::string errorMsg, void* extralInfo);   
    void OnDiscoverResult(DiscoverResult* discoverResult);   
    void OnConnectResult(DeviceInfo* deviceInfo);   
    void OnDisconnectResult(int reason);   
    void OnSharePlayResult();   
    void OnShareStopResult(int reason);   
    ....   
}
```
ShareEventHandler.cpp 实现
```
#include "IShareServiceController.h"   
#include "IdeaShareDef.h"   
   
IShareEventHandler::~IShareEventHandler() {}   
   
void IShareEventHandler::OnError(ShareAppErr errorCode, std::string errorMsg, void* extralInfo   
{   
  // 错误事件上报   
}   
void IShareEventHandler::OnDiscoverResult(DiscoverResult* discoverResult)   
{   
  //投屏码查询   
}   
void IShareEventHandler::OnConnectResult(DeviceInfo* deviceInfo)   
{   
   // 连接事件上报   
}   
void IShareEventHandler::OnDisconnectResult(int reason)   
{   
   //断开连接事件上报   
}   
void IShareEventHandler::OnSharePlayResult()   
{   
  // 开始共享事件上报   
}   
void IShareEventHandler::OnShareStopResult(int reason)   
{   
   //结束共享事件上报   
}   
.....
```
详情参见[4.6.4](https://support.huaweicloud.com/ideahub-IdeaShare-SDK/win-sdk-0036.html)通知参考。