Using HAL to switch contactor

Hi, I'm trying to get Linuxcnc to switch a contactor when T2 M6 occurs. I am running a 5i25 7i76 combination and would like an output to go high at T2 M6. Should I be looking to build my own HAL component as I can't figure out a way to achieve this with built in components? If building a component is the way forward it appears that I could use C or Python, yet I am struggling to find out why you may pick one over the other.
Many thanks,
Guy

Thanks JT, I've had a look at your classicladder tutorials and think I'm starting to understand it but I can't figure out how to process tool number information? I've found the relevant hal pin, should I do something with counters do you think?

BigJohnT wrote:

Are you changing tools or just turning on an output?

I'm using the output to operate a contactor, swapping the VFD from one spindle to another

No problem, just found out about the compare object and I'm away now !