Nadya,

I have personally created a couple of solutions based upon variable field quantitys, types and validation etc.

1. Properties/Options Form using a treeview and custom UI control classes. You create a pageframe with no tabs that contains the UI control for each datatype you want to support (combo, spinner, textbox, editbox etc). Add code to the NodeClick() method that selects the correct page and then updates properties such as ControlSource, Format, SpinnerHighValue etc.

2. Dynamic form to verify the content of incoming->outgoing EDI messages. You build a bunch of classes/UI controls that populate a scrolling form (This simplified the field placement logic for me <g>). Again you can then set various propertys for each field based on some sort of table/array that holds all your dynamic properties.