I am writing a large app that is going to several clients and I am wondering how to handle the various inputs required for reports ie; A/R Aging report requires a date field, an optional customer ID, an optional Salesman ID, and an optional 'number of days overdue' variable.
I allow 'super-users' of the system to modify report layouts as required and I would like them to be able to add reports to the system. But how to handle these inputs that are required for most reports? Do I design a form class and show it and add objects to it in the init of the report? Sounds like a lot of work...

We are using SQL 2000 on the back end and have made stored procs to actually retrieve the data for each report by passing them the parameters required.

Thanks.