| 摘要 |
A technique, system, and computer program for enabling workstation software applications to efficiently and reliably use legacy host application data streams, without requiring change to the host applications. This is achieved by defining attributes of presentation spaces (screens or parts of screens) that are of interest to the workstation application, defining target objects to process the legacy host data, registering these attribute definitions and corresponding target objects with a screen recognition object, using the screen recognition object to monitor the host data streams for occurrence of a registered screen, and generating an asynchronous event to invoke the target object when a registered screen is detected. The efficiency is obtained because the workstation application programmer no longer has to write code to monitor the host data streams for the screens of interest. The reliability is obtained because the application programmer now reliably knows when a screen of interest appears in the host data stream.
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