---
title: mObjectID
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.7+]
path: iokit/iovideodevicenotification/1503906-mobjectid
---

# mObjectID

The ID of the object to which the notification pertains.

## Declaration

```occ
UInt32 mObjectID;
```