This wraps the ObjectARX AcDbAssocEvaluationCallback class. 

A mechanism for AssocActions to notify about the progress of evaluation, to report success or failure, notify about which objects the action is going to use and modify, to allow the evaluation to be cancelled by the client, etc. 

Pointer to an object of AssocEvaluationCallback class in a mandatory argument to the AssocAction.Evaluate() method. AssocManager manages an ordered collection of global AssocEvaluationCallbacks grouped in an AssocEvaluationMultiCallback. AssocManager.EvaluateTopLevelNetwork() passes this multi-callback to the AssocAction.Evaluate() method of the top-level network.

Autodesk.AutoCAD.DatabaseServices.AssocEvaluationCallback

Public abstract Class AssocEvaluationCallback
Inherits IDisposable

public abstract class AssocEvaluationCallback : IDisposable;