Creating a VisualForce email template which invokes an Apex Class.

Recently, I created my first “VisualForce” email template.  I found that lots of the documentation for VisualForce for when you were creating “Pages” and not “Email Templates.”

See my solution outlined here for a basic tutorial on how to create a visualforce template which needs to access Apex controllers and Apex classes to perform basic math operations etc.

http://community.salesforce.com/sforce/board/message?board.id=Visualforce&message.id=14004&jump=true#M14004