This wraps the ObjectARX AcDbAssocFaceActionParam class.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.AssocActionParam
        Autodesk.AutoCAD.DatabaseServices.AssocFaceActionParam

Public Class AssocFaceActionParam
Inherits AssocActionParam

public class AssocFaceActionParam : AssocActionParam;