I have been searching for days on resources to read or tutorials to follow regarding custom SP 2010 workflows created in Visual Studio and aspx pages used for setting values. I have no problem creating and deploying the workflow itself. What I cannot seem to find any information on, and it could be I am just using the wrong terms in my searches, is how to add a page so various settings can be specified when the workflow is added to a given list or library.
I notice that when you go to List Settings --> Workflow Settings, then select a workflow from the template list, some of the workflows show an OK button and the others (like the Three-state workflow) show a Next button. Clicking Next takes you to a page (different for each workflow) where the person adding the workflow can set values used during the workflow execution.
Any information with this subject would be greatly appreciated.