jbow

im using the Helix floor unit,i've set a midi track in Sonar X1 Producer going out a Focusrite 2i4 audio interface via Usb,it has Midi outs & Ins on it,in the Midi track i have events setup to change presets,what i'm trying to figure out is how to set up program changes by inserting a controller event to turn on  &off Fx in the Snapshot i've got setup.i've seen a guy on You tube doing this with Logic so i know it, can be done just not sure how to do it in Cakewalk can somebody please help,thanks?