SharePoint Workflow in ASPX - Part 3

Associating ASPX form with workflow task:
Create a content type which is having your requierd columns in Workflow task.
Design a ASPX page of your custom logic, and keep the form in _Layouts folder. Provide the content type edit form url and display form url as this page.
Deploy the content type in SharePoint. This content type will be having 1 content type id, copy this content type id and paste it in Workflow.xml TaskContentTypeId.

Now all the task you are creating thru Workflow will be opened in that newly deployed ASPX page.

Next: How to read Workflow values from ASPX page.