Help in programming

As with the function:
void __stdcall SPMunitionCollision(…
or
void __stdcall HkCb_AddDmgEntry(…
Get in ID someone hit by a shell or bullet.

dmg->get_inflictor_id();
I do not work (it is not clear that getting)

(In short how to get the ID the victim?)

HkGetClientIDByShip(ci.dwTargetShip);

found.
Thanks to all.