Accessing Data from Workflow Association and Initiation Forms in Windows SharePoint Services 3.0

Reference 

Accessing Data from Workflow Association and Initiation Forms in Windows SharePoint Services 3.0

Overview

It is often that a Workflow template would need some initial parameters when it is first associated to a document library or started by an event. In SharePoint Products, it is supported by adding Association and Initiation Forms to the Workflow template.

However, WSS 3.0 does not support InfoPath Form Services (I remember only MOSS 2007 Enterprise Edition supports this). We are going to create the Assoc/Init Forms by ASP.NET Forms, and apply the form value into the Workflow instance.