CRM/ERP integration with search systems

Hi,

Presently we are facing lot of problems with incorrect addresses, it is denting our day to day process where our shipments are being sent to worng addresses. we want to integrate CRM and ERP with a third party address search system so that when a user enters details in SAP, automatically it connects to third party address search system (sort of pop up) which gives you correct details. can any one give inputs how do we integrate the same.

Third party has webservices, I am reading integration with BSP's and webdynpro ABAP. Can any one guide me how do we achieve the integration when user enters in SAP some address details it needs to connect to address search system it validates and get's back to SAP.

Thanks ,

Madhu latha