From the KB article you cited:
Follow the steps below to create and run a VBScript routine that will change all the items in a folder to a specified form. This example assumes that you have published a new form called MyNewForm in the current folder. If you use a different name for your form, modify the form name used in the third line of code in the section "Enter the VBScript Code."
There are four steps you must take:
•Create a new item to store the VBScript code.
•Enter the VBScript code and save the form.
•Publish the form.
•Use the new form.
etc.
The "Use the new form" means "use it just once to change the existing items." In other words, Form #1 is the new contact form you published. Form #2 is the form that you create, using the steps in the KB article, solely for the purpose of running it once to change the MessageClass property on the existing items. You would likely never use Form #2 again. (And, as an aside, you could run the same code from a VBA procedure instead of the Item_Open event handler in Form #2; it's an old article.)
This statement in the code determines which folder it acts on:
Set CurFolder = Application.ActiveExplorer.CurrentFolder
ActiveExplorer.CurrentFolder is the folder that the user is currently viewing.
--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers