How to: Set Environment Variables
Visual Studio 2010
The vsvars32.bat file sets the appropriate environment variables to enable command-line builds. For more information about vsvars32.bat, see Knowledge Base article Q248802: You receive the "Out of environment space" error message when you execute the Vcvars32.bat batch file.
If the current version of Visual Studio is installed on a computer that also has an earlier version of Visual Studio, you should not run vsvars32.bat or vcvars32.bat from different versions in the same Command Prompt window.
To run VSVARS32.BAT
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At a command prompt, change to the C:\Program Files\Microsoft Visual Studio 10.0\Common7\Tools (安装visual studio的目录不同而不同)subdirectory of your installation.
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Run VSVARS32.bat by typing VSVARS32.