I want the different techniques for this. There are a few variations on user interface integration, also known as screen scraping. The benefit of this approach is that it is easy and noninvasive. The disadvantage is that if the application changes, the interface will change and the integration will need to be reprogrammed. Also, if multiple screens need to be combined in one GUI screen, performance can be a significant issue.
Different vendors provide variations on the theme to improve performance and adaptability.
These techniques include parallel access of multiple data streams to populate a Web screen for better performance and techniques for traversing multiple screens. For information on vendors that provide this approach to integration, see the list of legacy integration vendors in our ebizQ e-Business Integration Roadmap .