use the depends.exe that is in the vc++ 6.0 install bin directory to find out what dlls are required, then install those dlls with your program. You must take care not to overwrite newer versions of the same dll that is on the target machine. If you use an install program such as InstallShield it will make those tests. To minimize the number of dlls that you need to install you can compile your program for Release Minimum Dependencies and the compiler will statically link most of them. It will make your program .exe bigger but reduce the number of dependent dlls