# TXTRecordContainsKey(_:_:_:) Allows you to determine if a given TXT Record contains a specified key. ``` func TXTRecordContainsKey(_ txtLen: UInt16, _ txtRecord: UnsafeRawPointer!, _ key: UnsafePointer!) -> Int32 ``` ## Parameters `txtLen` The size of the received TXT Record. `txtRecord` Pointer to the received TXT Record bytes. `key` A null-terminated ASCII string containing the key name. ## Return Value Returns 1 if the TXT Record contains the specified key. Otherwise, it returns 0. --- 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)