# MIDIObjectFindByUniqueID(_:_:_:) Locates a device, entity, or endpoint by its unique identifier. ``` func MIDIObjectFindByUniqueID(_ inUniqueID: MIDIUniqueID, _ outObject: UnsafeMutablePointer?, _ outObjectType: UnsafeMutablePointer?) -> OSStatus ``` ## Parameters `inUniqueID` The unique ID of the object to search for. You determine the unique ID by querying [`MIDIObjectGetIntegerProperty(_:_:_:)`](/documentation/CoreMIDI/MIDIObjectGetIntegerProperty(_:_:_:)) for the [`kMIDIPropertyUniqueID`](/documentation/CoreMIDI/kMIDIPropertyUniqueID) property. `outObject` The returned object, or 0 if the object wasn’t found or an error occurred. Cast this pointer to the appropriate type, according to type specified by the `outObjectType` argument. `outObjectType` On exit, the type of object found, or undefined if the system found no objects. ## Return Value An `OSStatus` error code, including [`kMIDIObjectNotFound`](/documentation/CoreMIDI/kMIDIObjectNotFound) if there is no object with this unique ID. ## Topics ### Parameter Types [`MIDIUniqueID`](/documentation/CoreMIDI/MIDIUniqueID) A MIDI object’s unique identifier. [`kMIDIInvalidUniqueID`](/documentation/CoreMIDI/kMIDIInvalidUniqueID) An invalid identifier. [`MIDIObjectType`](/documentation/CoreMIDI/MIDIObjectType) The MIDI object types that the system supports. --- 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)