Abstract: A system for creating a response to input by an electronic pen comprises: a processing unit, which records positions when the electronic pen is used for writing; and a software module, which is arranged to receive pen data created by the processing unit during writing and which is arranged to refine said pen data by identifying pen data representing occurrences of specific events and create event data representing such specific events occurring. The system further comprises an application for providing processing instructions to be performed in response to input by the electronic pen. The application is arranged to load an electronic file to said software module, wherein said electronic file comprises information regarding the printed document on which writing is made, and to provide set-up instructions to said software module, wherein the set-up instructions are application-specific and customizes the software module to the application.