Как использовать этот код?

D2ItemData

static BOOL DEMO_PRV_TakeItemFromInventory(D2Game* pGame, D2Unit* pUnit, D2Unit* pItem)
{
    D2Inventory* hInventory;
    if ((hInventory = pUnit->hInventory) == NULL)
        return FALSE;
    
    if (!UNIT_IS_ITEM(pItem) || pItem->eMode != ITEMMODE_INVENTORY)
        return FALSE;
    
    D2ItemData* pItemData;
    ASSERT(pItemData = pItem->pItemData);
    BYTE ePage = pItemData->ePage;
    
    ASSERT(D2RemoveItemFromInventory(hInventory, pItem) == pItem);
 
    if (ePage == INVENTORY_PAGE_PLAYER_INVENTORY)
        SITEM_AddOrRemoveBookCharges(pUnit, pItem, FALSE, TRUE);
 
    SITEM_RemoveItemStatsFromUnit(pUnit, pItem, FALSE, TRUE);
    if (ITEMS_CanActivateCharm(pItem, pUnit))
        SITEM_UpdateEquipment(pGame, pUnit, FALSE);
 
    pItemData->ePreviousPage = ePage;
    pItemData->ePage = INVENTORY_PAGE_NONE;
    pItem->dwUnitFlags &= ~UNITFLAG_SELECTABLE;
    UNITS_SetMode(pItem, ITEMMODE_CURSOR);
    
    pItemData->dwItemFlags |= ITEMFLAG_REMOVED;
                    
    if (SITEM_DoSocketsHaveContent(pItem))
        pItemData->dwItemFlags |= ITEMFLAG_RELOAD;
    
    pItemData->dwItemFlags &= ~ITEMFLAG_DISABLED;
    pItemData->dwCMDFlags |= ITEMCMD_INVENTORY_TAKE_ITEM;
    D2AddItemToInventoryUpdateList(hInventory, pItem);
    D2SetInventoryUpdateMessage(pUnit, TRUE);
    return TRUE;
}

static void DEMO_PRV_MoveEntireInventoryToStash(D2Game* pGame, D2Unit* pPlayer)
{
    D2ItemData* pItemData;
    D2Unit* pItem = INV_INL_GetItemListByGrid(pPlayer->hInventory, INVENTORY_GRID_DEFAULT);
    
    while (pItemData = ITEMS_INL_GetIterator(pItem))
    {
        D2Unit* pNext = pItemData->pNextItemInPage;
        
        int nX;
        int nY;
        
        if (INV_INL_GetPosForItem(pPlayer->hInventory, pItem, INV_GetInventoryType(pPlayer, INVENTORY_PAGE_PLAYER_STASH, pGame->bExpansion), INVENTORY_PAGE_PLAYER_STASH, nX, nY))
        {
            if (DEMO_PRV_TakeItemFromInventory(pGame, pPlayer, pItem))
                ASSERT(SITEM_PutItemInInventory(pGame, pPlayer, pItem->dwID, INVENTORY_PAGE_PLAYER_STASH, nX, nY, FALSE, TRUE, NULL, NULL));
        }
        
        pItem = pNext;
    }
}