1e41f4b71Sopenharmony_ci# hiappevent_param.h 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## Overview 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ciDefines the names of all predefined event parameters. 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ciIn addition to custom events associated with specific applications, you can use predefined events for logging. 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ciExample: 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci``` 13e41f4b71Sopenharmony_ciParamList list = OH_HiAppEvent_CreateParamList(); 14e41f4b71Sopenharmony_ciOH_HiAppEvent_AddInt32Param(list, PARAM_USER_ID, 123); 15e41f4b71Sopenharmony_ciint res = OH_HiAppEvent_Write("user_domain", EVENT_USER_LOGIN, BEHAVIOR, list); 16e41f4b71Sopenharmony_ciOH_HiAppEvent_DestroyParamList(list); 17e41f4b71Sopenharmony_ci``` 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci**Since**: 8 20e41f4b71Sopenharmony_ci 21e41f4b71Sopenharmony_ci**Related module**: [HiAppEvent](_hi_app_event.md) 22e41f4b71Sopenharmony_ci 23e41f4b71Sopenharmony_ci 24e41f4b71Sopenharmony_ci## Summary 25e41f4b71Sopenharmony_ci 26e41f4b71Sopenharmony_ci 27e41f4b71Sopenharmony_ci### Macros 28e41f4b71Sopenharmony_ci 29e41f4b71Sopenharmony_ci| Name| Description| 30e41f4b71Sopenharmony_ci| -------- | -------- | 31e41f4b71Sopenharmony_ci| [PARAM_USER_ID](_hi_app_event.md#param_user_id) "user_id" | User ID.| 32e41f4b71Sopenharmony_ci| [PARAM_DISTRIBUTED_SERVICE_NAME](_hi_app_event.md#param_distributed_service_name) "ds_name" | Distributed service name.| 33e41f4b71Sopenharmony_ci| [PARAM_DISTRIBUTED_SERVICE_INSTANCE_ID](_hi_app_event.md#param_distributed_service_instance_id) "ds_instance_id" | Distributed service instance ID.| 34