---
title: UniCharArrayOffset
framework: Core Services
role: symbol
role_heading: Type Alias
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/unichararrayoffset
---

# UniCharArrayOffset

Represents the boundary between two characters.

## Declaration

```occ
typedef unsigned long UniCharArrayOffset;
```

## Discussion

Discussion A UniCharArrayOffset represents the boundary between two characters. For example, the first character in a buffer lies between offsets 0 and 1. So the first character in the buffer can be referred to as either “offset 0, leading” or “offset 1, trailing.” This distinction is useful when you deal with caret positions.