---
title: open
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iohipointing/3516603-open
---

# open

## Declaration

```occ
bool open(IOService *client, IOOptionBits options, void *, RelativePointerEventCallback rpeCallback, AbsolutePointerEventCallback apeCallback, ScrollWheelEventCallback sweCallback);
```