Extending An Existing User Interface Toolkit To Support Gesture Recognition James A. Landay and Brad A. Myers Adjunct Proceedings of INTERCHI '93, Amsterdam, The Netherlands, Apr 24 - Apr 29, 1993. ACM, New York, 1993, pp 91-92. Gestures are a powerful way to specify both objects and operations with a single mark of a stylus or mouse. We have extended an existing user interface toolkit to support gestures as a standard type of interaction so that researchers can easily explore this technology.