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# init

Initializes an instance of a custom property.

```
virtual bool init(IOUserAudioDriver *in_audio_driver, IOUserAudioObjectPropertyAddress in_prop_addr, bool in_is_property_settable, IOUserAudioCustomPropertyDataType in_qualifier_data_type, IOUserAudioCustomPropertyDataType in_data_type);
```

## Parameters

`in_audio_driver`

The [`IOUserAudioDriver`](/documentation/AudioDriverKit/IOUserAudioDriver) that owns this object.

`in_prop_addr`

The [`IOUserAudioObjectPropertyAddress`](/documentation/AudioDriverKit/AudioDriverKit/IOUserAudioObjectPropertyAddress) of the custom property.

`in_is_property_settable`

A Boolean value that indicates if the property can be set.

`in_qualifier_data_type`

The [`IOUserAudioCustomPropertyDataType`](/documentation/AudioDriverKit/AudioDriverKit/IOUserAudioCustomPropertyDataType) for custom property’s qualifier data value.

`in_data_type`

The [`IOUserAudioCustomPropertyDataType`](/documentation/AudioDriverKit/AudioDriverKit/IOUserAudioCustomPropertyDataType) for custom property’s data value.This value can’t be `IOUserAudioCustomPropertyDataType::None`.

## Return Value

`true` if initialization succeeded; `false` otherwise.

---

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