Adding Pre and Post Gcode to Versa Probe

Hi, 

I have a touch probe that requires an additional activation signal prior to probing. I've mapped motion.digital-out-00 to the pin and would like to know the best way to add M64 P0 before probing and M65 P0 after. Should that be added to each probe routine, or would it be better to use a macro for that functionality? I'm using Qtdragon_hd and Versaprobe.   

Thank you

What version of linuxcnc?

This is for v2.10. My apologies for the ambiguity. 
Thank you

So there is currently no built in way to do this.
The probe routines in master are burried in probe_subprobe.py
github.com/LinuxCNC/linuxcnc/blob/master...ets/probe_subprog.py

The is a pre and post function in there.

prechecks()
postreset()

You could hand edit them to add your calls.
I guess adding an INI pre and post command might be helpful.
What does your calls do?