Mark, Ar you talking about Flex Viewer Apps??? If so you are in the wrong forum. But to answer your question (if it is about the viewer) you would add your customized widgets to the new viewer frame work so that you can take advantage of the updates that esri made to the viewers core framework as well as the API updates.
Les membres connectés peuvent publier, suivre les mises à jour, et plus encore. Nouveau ici ? Inscrivez-vous gratuitement.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.