Create a point to point nav link

hello , im new in c++ and i want to create a point to point nav link function for blueprint
the way it work is simple , it tell the ai it can move to b if you went to point a just link a nav link proxy
, but it would send a event to blueprint and the what ai want to go and it make ai stop , and i can resume it with blueprint
if i want .

i went to the navlinkproxy c++ file to look i cant copy the function i need to a new c++ file but it just went out a lot of
error . please help me if you know how to make it, thank you for you time and sorry for bad english