A multicasting system for multicasting window events to various application programs running on a computer system, each such program having an application window. A global control program runs on the computer system and has a global control window. Through the global control program, a ...http://www.google.de/patents/US5742778?utm_source=gb-gplus-sharePatent US5742778 - Method and apparatus to sense and multicast window events to a plurality of existing applications for concurrent execution 
