# OH_CommonEvent

<!--Kit: Basic Services Kit-->
<!--Subsystem: Notification-->
<!--Owner: @peixu-->
<!--Designer: @dongqingran; @wulong158-->
<!--Tester: @wanghong1997-->
<!--Adviser: @huipeizi-->

## Overview

Provides the capability of subscribing to and unsubscribing from common events.

**System capability**: SystemCapability.Notification.CommonEvent

**Since**: 12

## Files

| Name| Description|
| -- | -- |
| [oh_commonevent.h](capi-oh-commonevent-h.md) | Defines the APIs for subscribing to and unsubscribing from common events and enumerates the error codes.|
| [oh_commonevent_support.h](capi-oh-commonevent-support-h.md) | Provides common event constants defined by the system.|