---
title: usage
framework: corehid
role: symbol
role_heading: Instance Property
path: corehid/hidusage/usage
---

# usage

The usage value.

## Declaration

```swift
var usage: UInt16? { get }
```

## Discussion

Discussion The usage combines with the page to determine specific functionality. This may not be specified, in which case the HIDUsage refers to the overall page.