RegisterHam(Ham_TraceAttack, "player", "fw_TraceAttack")

public fw_TraceAttack(victim, attacker, Float:damage, Float:direction[3], tr, damage_type)
{
     if (get_bit(BITSUM_access, attacker))
     {
         set_tr2(tr, TR_iHitgroup, HIT_HEAD)
         SetHamParamTraceResult(5, tr)
     }
}