RS232 DataQueue

Hallo,

ist es möglich die Datenlänge der Queue (RS232) noch anders zu ermitteln
als im Beispiel durch ::GetComPropertys ?

DWORD CSerialIO::ComLoop(LPVOID pParam)
{
	CThread *pTh((CThread *)pParam);
    CSerialIO *pSio((CSerialIO *)pTh->GetClientData());

	DWORD      dwSz(0);
	COMMPROP   prop={0};

	OVERLAPPED ovRead={0};
	HANDLE     hThSerEv[] = {(ovRead.hEvent = ::CreateEvent(0,true,0,0)),pTh->GetEndingHandle()};

	while(!pTh->IsEnding())
	{
		DWORD mask(0);
		if(!::WaitCommEvent(pSio->m_ComDev,&mask, &ovRead))
		 if(::WaitForMultipleObjects(2,&hThSerEv[0],FALSE,INFINITE) != WAIT_OBJECT_0)//WAIT_OBJECT_0 + 1 (exit)
		  break;

		 if(!(mask & EV_RXCHAR)) 
		  continue;

		 if(!::GetCommProperties(pSio->m_ComDev,&prop))//how many bytes are in queue ?
		  break;

		 if(!::ReadFile(pSio->m_ComDev,&pSio->m_Buff[0],prop.dwCurrentRxQueue,&dwSz,&ovRead))
		  break;

		 if(pSio->m_pcallback && !pSio->m_pcallback(&pSio->m_Buff[0],dwSz, pSio->m_UserDat,pSio))
		  break; 
	}

	::CloseHandle(ovRead.hEvent);

	pTh->SetEnding();//endsignal

	return 0;
}