char_item.cpp -------------->

        if (item2->GetType() == ITEM_ARMOR || item2->GetType() == ITEM_ARMOR && item2->GetSubType() == ARMOR_FOOTS)
        {
            if (!IS_SET(item->GetWearFlag(), WEARABLE_BODY) || !IS_SET(item2->GetWearFlag(), WEARABLE_BODY) || !IS_SET(item2->GetWearFlag(), WEARABLE_FOOTS))
            {
                ChatPacket(CHAT_TYPE_INFO, LC_TEXT("ŔĚ ¸ŢĆľĽ®Ŕş Ŕĺşńżˇ şÎÂřÇŇ Ľö ľř˝Ŕ´Ď´Ů."));
                return false;
            }
        }

item.cpp -------------->

void CItem::ModifyPoints(bool bAdd)
{
    int accessoryGrade;

    // ą«±âżÍ °©żĘ¸¸ ĽŇÄĎŔ» Ŕűżë˝ĂŲ´Ů.
    if (false == IsAccessoryForSocket())
    {
        if (m_pProto->bType == ITEM_WEAPON || m_pProto->bType == ITEM_ARMOR || m_pProto->bType == ITEM_ARMOR && m_pProto->bSubType == ARMOR_FOOTS)
        {
            // ĽŇÄĎŔĚ ĽÓĽş°­Č­żˇ »çżëµÇ´Â °ćżě ŔűżëÇĎÁö ľĘ´Â´Ů (ARMOR_WRIST ARMOR_NECK ARMOR_EAR)
            for (int i = 0; i < ITEM_SOCKET_MAX_NUM; ++i)
            {
                DWORD dwVnum;

                if ((dwVnum = GetSocket(i)) <= 2)
                    continue;

                TItemTable * p = ITEM_MANAGER::instance().GetTable(dwVnum);

                if (!p)
                {
                    sys_err("cannot find table by vnum %u", dwVnum);
                    continue;
                }

                if (ITEM_METIN == p->bType)
                {
                    //m_pOwner->ApplyPoint(p->alValues[0], bAdd ? p->alValues[1] : -p->alValues[1]);
                    for (int i = 0; i < ITEM_APPLY_MAX_NUM; ++i)
                    {
                        if (p->aApplies[i].bType == APPLY_NONE)
                            continue;

                        if (p->aApplies[i].bType == APPLY_SKILL)
                            m_pOwner->ApplyPoint(p->aApplies[i].bType, bAdd ? p->aApplies[i].lValue : p->aApplies[i].lValue ^ 0x00800000);
                        else
                            m_pOwner->ApplyPoint(p->aApplies[i].bType, bAdd ? p->aApplies[i].lValue : -p->aApplies[i].lValue);
                    }
                }
            }
        }