Hi,

Please follow below steps:

1. create one screen to search for a customer. once user enter some text and click on search button call one activity to fetch the results(obj-browse) from DB and show validate message(Page-set-Messages) if not found and enable a button on link on same screen if not found to add a customer(Model dailog). on Moder dialog screen enter the new customer details submit to save(Obj-Save) the details in Customer DB.

Thanks...!