vcvars32.bat sets the appropriate environment variables to enable command line builds.
To run VCVARS32.BAT
Caution VCVARS32.bat can vary from machine to machine. Do not replace a missing or damaged VCVARS32.bat file with a VCVARS32.bat from another machine. Rerun setup to replace the missing file.
For more information about vcvars32.bat, see the following Knowledge Base article:
If the current version of Visual Studio is installed on a computer that also has a previous version of Visual Studio, you should not run vcvars32.bat from different versions in the same command window