def outWaiting(self):
        flags = win32.DWORD()
        comstat = win32.COMSTAT()
        if not win32.ClearCommError(self.hComPort, ctypes.byref(flags), ctypes.byref(comstat)):
            raise SerialException('call to ClearCommError failed')
        return comstat.cbOutQue

    # functions useful for RS-485 adapters
return how many characters the in the outgoing buffer
dataset/ETHPy150Open Robot-Will/Stino/stino/pyarduino/base/pyserial/serialwin32.py/Win32Serial.outWaiting