---
title: MIDINotificationMessageID.msgThruConnectionsChanged
framework: coremidi
role: symbol
role_heading: Case
path: coremidi/midinotificationmessageid/msgthruconnectionschanged
---

# MIDINotificationMessageID.msgThruConnectionsChanged

The system created or disposed of a persistent MIDI Thru connection.

## Declaration

```swift
case msgThruConnectionsChanged
```

## Discussion

Discussion This type has no data.

## See Also

### Change Types

- [MIDINotificationMessageID.msgSetupChanged](coremidi/midinotificationmessageid/msgsetupchanged.md)
- [MIDINotificationMessageID.msgObjectAdded](coremidi/midinotificationmessageid/msgobjectadded.md)
- [MIDINotificationMessageID.msgObjectRemoved](coremidi/midinotificationmessageid/msgobjectremoved.md)
- [MIDINotificationMessageID.msgPropertyChanged](coremidi/midinotificationmessageid/msgpropertychanged.md)
- [MIDINotificationMessageID.msgSerialPortOwnerChanged](coremidi/midinotificationmessageid/msgserialportownerchanged.md)
- [MIDINotificationMessageID.msgIOError](coremidi/midinotificationmessageid/msgioerror.md)