# CollapsibleSectionHolderImpl.CREATEFROMCPPPROC delegate

Namespace: [Rhino.UI.Controls](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.ui.controls.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public delegate CollapsibleSectionHolderImpl.CREATEFROMCPPPROC
```

**Signature:**

```cs
nint CollapsibleSectionHolderImpl.CREATEFROMCPPPROC(nint hwndParent, nint contentUIPointer)
```

**Parameters:**

- `hwndParent` ([nint](https://learn.microsoft.com/dotnet/api/system.intptr))
- `contentUIPointer` ([nint](https://learn.microsoft.com/dotnet/api/system.intptr))