Do you have only a single price for your products? No discounts for quantity purchased or by customer? What accounting system are you currently using?

Our OLEDB connection allows read-only access to the accounting data using and popular programming language. Our SDK allows read-write access to the files, but I would actively discourage anyone from trying to directly create an order. They'd have to completely re-create all the business logic in Adagio OrderEntry. Creating a formatted import file (using any of 6 different layouts) would be a much safer (and faster) approach. It would also allow someone to review an order for "reasonableness" before it was processed.