Workflow - Cookie (using code) - Web App
In this article I will show you how to create and retrieve Cookies in the 
Web App Project Type
Using a User Defined Type with the Script Component - Workflow
In this Article I will show you how to use a custom data type within the Script Component.
String with name 'XXX' has already been added - Workflow Integration Library
So you've created an 
Integration Component with SQL Generators etc included.