AXAPTA - Remove or add invent reservation

You can add or remove reservation with this code which I learned from Volkan Şişman:

  
InventUpd_Reservation       invUpdReservation; 
... 
//remove 
invUpdReservation = InventUpd_Reservation::newInventDim(InventMovement::construct(invTrans,InventMovSubType::None),myInventDim,200,false);
            invUpdReservation.updateNow();
...
//add
          invUpdReservation = InventUpd_Reservation::newInventDim(InventMovement::construct(invTrans,InventMovSubType::None),myInventDim,400,false);
            invUpdReservation.updateNow();

Or:

//add
     InventUpd_Reservation::updateReserveBuffer(journalTrans, journalTrans.Qty);

//remove
     InventUpd_Reservation::updateReserveBuffer(journalTrans, abs(journalTrans.Qty)); 

Or:

//add

InventUpd_Reservation::newInventDim(InventTrans.inventMovement(true),InventTrans.inventDim(),-InventTrans.qty,true).updateNow();