How to move a page item from an IDocument from Location (x1,y1) to (x2,y2)

IDataBase* db = ::GetDataBase(iDocument);

UIDList pageItems(db);

InterfacePtr<ISpreadList> iSpreadList(iDocument, UseDefaultIID());

for (uint32 i = 0; i < iSpreadList->GetSpreadCount(); i++)

{

    UID spreadUID = iSpreadList->GetNthSpreadUID(i);

    InterfacePtr<ISpread> spread(db, spreadUID, UseDefaultIID());

    for (int32 i = 0; i < spread->GetNumPages(); i++)

    {

        spread->GetItemsOnPage(i, &pageItems, kFalse);

        //How to move the pagItems from x,y location to x2,y2 location, for instance from the Rectangle from from middle of the page to location 0,0

    }   

}