Welcome to CSerialPort, a freeware MFC class to support access to the Win32 APIs dealing with serial ports. Features Simple and clean C++ interface. Uses C++ exceptions in preference to the normal Win32 return value mechanism. This ensures that code which uses CSerialPort is more robust. Unicode enabled, supports linking to MFC statically and all code compiles cleanly at warning level 4. Supports overlapped, blocking and callback usage models of the serial port. (Callback is only supported on NT). The enclosed zip file contains the CSerialPort source code and a simple test program which exercises all class API s.