# CFTreeSetContext(_:_:) Replaces the context of a tree by releasing the old information pointer and retaining the new one. ``` func CFTreeSetContext(_ tree: CFTree!, _ context: UnsafePointer!) ``` ## Parameters `tree` The tree to modify. `context` The [`CFTreeContext`](/documentation/CoreFoundation/CFTreeContext) structure to be copied and used as the context of the new tree. The information pointer will be retained by the tree if a retain function is provided. If this value is not a valid C pointer to a [`CFTreeContext`](/documentation/CoreFoundation/CFTreeContext) structure-sized block of storage, the result is undefined. If the version number of the storage is not a valid [`CFTreeContext`](/documentation/CoreFoundation/CFTreeContext) version number, the result is undefined. ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)