---
title: keyLayoutHeaderFormat
framework: coreservices
role: symbol
role_heading: Instance Property
path: coreservices/uckeyboardlayout/1390425-keylayoutheaderformat
---

# keyLayoutHeaderFormat

An unsigned 16-bit integer identifying the format of the structure. Set to kUCLayoutHeaderFormat.

## Declaration

```swift
var keyLayoutHeaderFormat: UInt16
```