how do I convert a 2010 Project Macro to an Addin using visual Studio 2012

I have a macro that runs in Project 2010. I want to conver this to a MS Project Add-in.

I have Visual studio 2012 installed and added my code into Public Class this AddIn.

All of my declarations using Dim fail because the VB Studio does not know the Types. (Assignment, TimeScaleValue, etc.)

Is there a previous answer that defines how to configure Visual Studio?

Thanks.