Server Application code (port.cpp)

Port::Port(unsigned port, unsigned baud) : DefaultTimeout(1000) {

char buf[32];

DCB commState;

sprintf(buf, "COM%i", port);

if( (handle = CreateFile(buf,

GENERIC_READ | GENERIC_WRITE,

0,

0,

OPEN_EXISTING,

FILE_FLAG_OVERLAPPED,

0)) == INVALID_HANDLE_VALUE ) {

handle = 0;

}

else {

GetCommState(handle, &commState);

commState.BaudRate = baud;

commState.Parity = NOPARITY;

}

}

unsigned

Port::Write(const void* buf, unsigned szBuf) {

DWORD check = 0;

if( handle ) {

WriteFile(handle, buf, szBuf, &check, 0);

}

return check;

}

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