---
title: soWordCallBack
framework: Application Services
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.0+]
path: applicationservices/1552228-speech-channel_information_constants/sowordcallback
---

# soWordCallBack

## Declaration

```occ
soWordCallBack = 'wdcb'
```

## Discussion

Set the callback function to be called everytime the Speech Synthesis Manager is about to generate a word onthe speech channel. The `speechInfo` parameteris a pointer to an application-defined word callback function, whose syntax is described in [SpeechWordProcPtr](../speechwordprocptr.md).Passing `NULL` in `speechInfo` disablesthe word callback function.

This selector works with the `SetSpeechInfo` function.