my code is as follow:

TInt scode=0;   
TRawEvent aEvent;

//send keydown event             
aEvent.Set(TRawEvent::EKeyDown, scode);      
ccoeenv->WsSession().SimulateRawEvent(aEvent);

 //send keypress event             
TKeyEvent aKeyEvent;            
aKeyEvent.iCode = code;            

  //trying to autorepeat a code=0 crashes          
aKeyEvent.iModifiers = EModifierAutorepeatable;      

aKeyEvent.iRepeats = 1;             
aKeyEvent.iScanCode = scode;         

ccoeenv->WsSession().SimulateKeyEvent(aKeyEvent);      
for the most keys,it's OK,but it's so strange that some keys cant stop when it's begin to repeat ,can anyone tell me why ??

Thanks very much for any advance !!!