---
title: passThruParams
framework: coreservices
role: symbol
role_heading: Instance Property
path: coreservices/lslaunchurlspec/1445136-passthruparams
---

# passThruParams

A pointer to an Apple event descriptor that is passed untouched as an optional parameter, with keyword keyAEPropData ('prdt'), in the Apple event sent to each application launched or activated (whether individual preferred applications or the application designated by appURL). See the Apple Event Manager Reference in the Carbon Interapplication Communication Documentation for a description of the AEDesc data type. The value of this field can be NULL.

## Declaration

```swift
var passThruParams: UnsafePointer<AEDesc>?
```

## See Also

### Configuring a Launch URL

- [appURL](coreservices/lslaunchurlspec/1443566-appurl.md)
- [asyncRefCon](coreservices/lslaunchurlspec/1448168-asyncrefcon.md)
- [itemURLs](coreservices/lslaunchurlspec/1443759-itemurls.md)
- [launchFlags](coreservices/lslaunchurlspec/1443957-launchflags.md)