CodeDomProvider: where is the LIB environment variable located?

Question

I'm using a System.CodeDom.Compiler.CodeDomProvider.CreateProvider("CSharp") to compile C# classes on the fly. Recently I've switched from Visual Studio 2010 to Vistual Studio 2012. I also uninstalled SQL 2005. Since these events I've been unable to compile my classes due to the following error:

Invalid search path 'C:\Program Files\SQLXML 4.0\bin\' specified in 'LIB environment variable' -- 'The system cannot find the path specified.

Where is this "LIB environment variable" located?

_{I've checked my Windows 7 Environment Variables (Control Panel\System\Advanced system settings\Advanced\Environment Variables\System variable), but it's not there.}

Answer 1

Creating the directory will fix the problem.