---
title: AETransactionID
framework: coreservices
role: symbol
role_heading: Type Alias
path: coreservices/aetransactionid
---

# AETransactionID

Specifies a transaction ID.

## Declaration

```swift
typealias AETransactionID = Int32
```

## Discussion

Discussion A transaction is a sequence of Apple events that are sent back and forth between the client and server applications, beginning with the client’s initial request for a service. When you call the AECreateAppleEvent(_:_:_:_:_:_:) function, you pass a value of type AETransactionID for the transactionID parameter. ID Constants for the AECreateAppleEvent Function lists the valid constant values for a variable or parameter of this type.