---
title: RegisterForNotification
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbinterfaceinterface942/2977241-registerfornotification
---

# RegisterForNotification

## Declaration

```occ
IOReturn (*RegisterForNotification)(void *self, UInt64 notificationMask, IOAsyncCallback2 callback, void *refCon, UInt64 *pRegistrationToken);
```