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  "identifier" : "/documentation/VideoDriverKit/IOUserVideoDriver/PropertiesChanged",
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  "title" : "PropertiesChanged"
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# PropertiesChanged

This method informs the host when the state of an driver’s object changes.

```
kern_return_t PropertiesChanged(IOUserVideoObjectID in_object_id, IOUserVideoObjectPropertySelector *in_properties, uint32_t in_num_properties);
```

## Parameters

`in_object_id`

The identifier of the object whose properties changed.

`in_properties`

An array of property selectors for the changed properties.

`in_num_properties`

The number of elements in the `in_properties` array.

## Return Value

A kern_return_t indicating success or failure.

## Discussion

For device objects, this method is only used for state changes that don’t
affect IO or the structure of the device.

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