This article describes how to call a VBA Class Module function from
VBScript. An example of where this may be used is to call a function
from a module or macro (VBA) using code in an Outlook form (VBScript).
The example code provided in the article creates an
"Outlook.Application" object, which is then used to call the function
within a module in Outlook.
Microsoft Outlook: Calling VBA Class Module function using VBScript
http://www.code-tips.com/2009/03/microsoft-outlook-calling-vba-class.html