Thanks to Stefan Pharies for this info. Look for a file named vcvars32.bat. It contains various path settings. Use it to update your autoexec.bat. Depending on your system, you might be able to simply call it from autoexec.bat, but I ran out of environment space. However, you can get more environment space by placing the following line in your config.sys file, and rebooting your system: shell=command.com /e:512 /p Also, if you see "Program Files", change it to "progra~1". Once you've gotten this to work (you may need a few reboot cycles), the compilation command is cl. cl /? gives you some options.