VB6 -制造一个新的MSAPC。Apc崩溃与“类不支持自动化或不支持预期接口”

A VB6 application is being developed. Internally it uses VBA SDK version 7.1. The application is an Active X DLL. When the line of code 'Set Host = New MSAPC.Apc' is executed an exception is thrown. The exception reads "Class does not support Automation or does not support expected interface". Host is a class member defined like this "Public WithEvents Host As Apc". For all intents and purposes this code should work but does not and I can't find anything resolution.A VB6 application is being developed. Internall