Skip to main content

Apple Developer Docs

Kernel / Anonymous / kHIDUsage_Button_40

kHIDUsage_Button_40

Declaration

kHIDUsage_Button_40 = 0x28

Open on developer.apple.com

KernelEnumeration Case

macOS 10.15+

Built on 2026-11-01 · Snapshot snapshot-20261101 (macOS 27.0.1) · Commit 864a336 · by @g-cqd · based on Apple Developer Documentation