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# CFPlugInDynamicRegisterFunction

A callback which provides a plug-in the opportunity to dynamically register its types with a host.

```
typealias CFPlugInDynamicRegisterFunction = (CFPlugIn?) -> Void
```

## Parameters

`plugIn`

The `CFPlugIn` object that is engaged in dynamic registration. When using in C++, this parameter functions as a `this` pointer for the plug-in.

## Discussion

This callback is called as a plug-in is being loaded. This provides the plugin the means to dynamically register its types and factories with a plug-in’s host. The call is triggered by the presence of [`kCFPlugInDynamicRegistrationKey`](/documentation/CoreFoundation/kCFPlugInDynamicRegistrationKey) in the plug-in’s information property list.

---

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