We introduce DEMOMATCH, a tool for API discovery that allows the user to discover how to implement functionality using a software framework by demonstrating the functionality in existing applications built with the same framework. DEMOMATCH matches the demonstrations against a database of execution traces called SEMERU and generates code snippets explaining how to use the functionality. We evaluated DEMOMATCH on several case studies involving Java Swing and Eclipse RCP. CCS Concepts • Software and its engineering → Automatic programming; Object oriented frameworks; • Humancentered computing → User interface programming