hComm = CreateFile(portNum ,GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);hComm = CreateFile(portNum ,GENERIC_READ
hComm = CreateFile(portNum ,GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);hComm = CreateFile(portNum ,GENERIC_READ