---
title: containingBundleURL
framework: videotoolbox
role: symbol
role_heading: Type Property
path: videotoolbox/vtextensionpropertieskey/containingbundleurl
---

# containingBundleURL

A dictionary key for the URL of the extension host application.

## Declaration

```swift
static let containingBundleURL: VTExtensionPropertiesKey
```

## Discussion

Discussion This key points to a CFURLRef value with the URL of the extension host application.

## See Also

### Keys

- [containingBundleName](videotoolbox/vtextensionpropertieskey/containingbundlename.md)
- [extensionIdentifier](videotoolbox/vtextensionpropertieskey/extensionidentifier.md)
- [extensionName](videotoolbox/vtextensionpropertieskey/extensionname.md)
- [extensionURL](videotoolbox/vtextensionpropertieskey/extensionurl.md)