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# FxXPCProtocol

```
protocol FxXPCProtocol
```

## Overview

\abstract The protocol used by all FxPlug 4 plug-ins to initiate contact with
the host application.
\discussion The plug-in should never use this protocol. It’s called by the host
application only.

## Topics

### Instance Methods

[`func createNewConnection(forProcessID: pid_t, minimumVersion: Int, maximumVersion: Int, hostCapabilities: [AnyHashable : Any]!, reply: ((NSXPCListenerEndpoint?, (any Error)?) -> Void)!)`](/documentation/professional_video_applications/FxXPCProtocol/createNewConnection(forProcessID:minimumVersion:maximumVersion:hostCapabilities:reply:))

[`func viewServiceListenerEndPoint(((NSXPCListenerEndpoint?) -> Void)!)`](/documentation/professional_video_applications/FxXPCProtocol/viewServiceListenerEndPoint(_:))

## Relationships

### Conforming Types

[`FxPrincipal`](/documentation/professional_video_applications/FxPrincipal)

### Inherited By

[`PROXPCProtocol`](/documentation/professional_video_applications/PROXPCProtocol)

---

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