Track the deal result from ExecuteMarketOrderAsync

Hi:

I am thinking to use  ExecuteMarketOrderAsync to place multiple orders at the same time, but also needs to monitor its executed results. Therefore I wrote something like this (but it doesnt work.) Any clue?

 

Order_Mark = ExecuteMarketOrderAsync(TradeType.Buy, m_symbol, m_volume);       

while (Order_Mark .IsExecuting )
{
             Print("waiting");
              Thread.Sleep(1000);
}

My idea is to check if the order is completed or not, but what I got is just endless "waiting", even if the order is already done (I can see that through the Journal)

Many thanks
Wjack07