A while back I ran a riddle site and one of the features was a cryptogram of the week. To automate the feature, I wrote a small C++ program that reads a message file and runs it through a simple letter replacement cipher. The output is not meant for secure communication nor any form illusion of security; it was meant for allowing people to have the enjoyment of solving the cryptogram. This program should compile on any C99 compliant C++ compiler, though only personally compiled it with g++ and djgpp. Download of GMCodeZ includes source .cpp file, as well as windows and Linux binary.