fFileSender
if (fFileSender != NULL) {
if (fFileSender->BytesReceived(bytes, length)) {
delete fFileSender;
fFileSender = NULL;
if (fFileSender != NULL)
delete fFileSender;
fFileSender = new XModemSender(file, &fSerialPort, fWindow);
fFileSender = new RawSender(file, &fSerialPort, fWindow);
delete fFileSender;
FileSender* fFileSender;