I need a C++ compiler to customize a DLL for an old client server software application. The documentation (written in 1998) states that I need Microsoft Visual C++ 5.0. Where does one go to purchase this software product that is now nearly 10 years old? If it is not available what would be the second best option? (i.e. What should I buy that would be backward compatible?) I don't need a fancy development environment or debugger as I will only be modifying a few lines of code. Is there anything that I can download free of charge? The OS is Windows 2003 server.