I am new to C++. I am using Visual studio 2008, MFC application. I need to do a GUI program using C++. I have come out with the GUI and now i need source code to communicate to external deivce like hard disk using serial port communication. My GUI let user choose the Com port, bit per sec, data bit, stop bit, parity bit and flow control. Once the user set all the setting, then it need to communicate with the exyernal deivce. Hope that someone will help me out with this. Thanks alot alot alot.