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# IOHIDElementType

The types of HID elements that you can examine.

```
enum IOHIDElementType : unsigned int;
```

## Overview

Use this type to identify the type of an element you are using. The type is also the value for the key `kIOHIDElementTypeKey` in the dictionary describing the element.

## Topics

### Getting the Element Types

[`kIOHIDElementTypeInput_Misc`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeInput_Misc)

The element contains an input data field of varying size.

[`kIOHIDElementTypeInput_Button`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeInput_Button)

The element contains a one-bit input data field.

[`kIOHIDElementTypeInput_Axis`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeInput_Axis)

The element contains an axis of movement.

[`kIOHIDElementTypeInput_ScanCodes`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeInput_ScanCodes)

The element contains an input field with a scan code or usage selector.

[`kIOHIDElementTypeInput_NULL`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeInput_NULL)

The element signals the end of an input data field in an input report.

[`kIOHIDElementTypeOutput`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeOutput)

The element contains a data field in an output report.

[`kIOHIDElementTypeFeature`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeFeature)

The element contains input and output data not intended for consumption by the end user.

[`kIOHIDElementTypeCollection`](/documentation/HIDDriverKit/IOHIDElementType/kIOHIDElementTypeCollection)

The element acts as a parent container for two or more related elements.


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