How do you kill a (window free) process in AHK?

Question

I have a windowless process I want to kill with AutoHotkey. (I could know anything, e.g. the PID.)

For example I have tried WinKill, eg with

WinKill , ahk_pid %p_id%

Nada. Anything else?

Answer 1

Simple.

Process, Close, %PidOfwindow%