WinSell Pro - Version 2 WinSell Business Solutions provides robust, scalable, SQL solutions in the following areas: invoicing / inventory control for wholesalers and distributors, in-store point of sale (pos) / inventory control for retailers, complete back-end order fulfillment, 100% integrated internet shopping cart & ecommerce add-on for business to business and business to consumer applications. Solutions can be customized or provided in a developer's toolkit.