1# hiappevent_param.h 2 3 4## Overview 5 6Defines the names of all predefined event parameters. 7 8In addition to custom events associated with specific applications, you can use predefined events for logging. 9 10Example: 11 12``` 13ParamList list = OH_HiAppEvent_CreateParamList(); 14OH_HiAppEvent_AddInt32Param(list, PARAM_USER_ID, 123); 15int res = OH_HiAppEvent_Write("user_domain", EVENT_USER_LOGIN, BEHAVIOR, list); 16OH_HiAppEvent_DestroyParamList(list); 17``` 18 19**File to include**: <hiappevent/hiappevent_param.h> 20 21**Library**: libhiappevent_ndk.z.so 22 23**System capability**: SystemCapability.HiviewDFX.HiAppEvent 24 25**Since**: 8 26 27**Related module**: [HiAppEvent](_hi_app_event.md) 28 29 30## Summary 31 32 33### Macros 34 35| Name| Description| 36| -------- | -------- | 37| [PARAM_USER_ID](_hi_app_event.md#param_user_id) "user_id" | User ID. | 38| [PARAM_DISTRIBUTED_SERVICE_NAME](_hi_app_event.md#param_distributed_service_name) "ds_name" | Distributed service name. | 39| [PARAM_DISTRIBUTED_SERVICE_INSTANCE_ID](_hi_app_event.md#param_distributed_service_instance_id) "ds_instance_id" | Distributed service instance ID. | 40