By using PortOpen to clear the Input buffer doesn't sounds right. Because I wouldn't know when is the last data sent from the serial port? Closing the port might cause lost of data, do you agree with me, Ian Johnston? Any other alternative? Thanks. > >>I managed to send data out to serial port by using MSComm control. Thanks. >>I used the INPUT property to receive data from the serial port, it does >>read, but when I read the 2nd time it is the same message. >> >>Anyway to clear away the previous read data, as I'm using the >>Timer to perform read at time interval. Pls advise, thanks. > >The way the documentation sounds calling input is suposed to clear the buffer but it does not. I use portopen to open and close the port this will clear the buffer and reread the serial port. > >Hope this helps.