After you have access to the PRoC TT user module, you will be able to tune your board by modifying parameters such as active distance threshold, scrolling speed, and so on. However, the source code for the gestures will NOT be distributed and modifying the source code will not be possible.
APIs available with the user module are for tuning and debugging purpose. We do not recommend you to use those APIs to develop your own gestures. For any further queries on customized gestures please mail us at firstname.lastname@example.org