Send CAN data from a button

Is it possible to send CAN data from a button? I’m running the program on large touchscreens and on multiple screens using a Matrox Triplehead. I use a CAN capable wiring harness and would love to be able to make buttons to do things like lock/unlock the doors, turn on lights etc.

Yes you can, with RealDash Can protocol, you must need to use 2way can.
Here a video testing hazard button: