Visual Studio Command Prompt
The Visual Studio Developer Command Prompt automatically sets the environment variables that enable you to easily use .NET Framework tools. The Developer Command Prompt is installed with Visual Studio.
For Visual Studio 2013 in Windows 8 or Windows 8.1
On the Start screen, type Visual Studio, and then choose Visual Studio Tools. (To access the Start screen, press the Windows logo key on your keyboard.)
In File Explorer, choose Developer Command Prompt for VS2013.
For Visual Studio 2012 in Windows 8 or Windows 8.1
On the Start screen, type Developer Command, and then choose Developer Command Prompt for VS2012. (To access the Start screen, press the Windows logo key key on your keyboard.)
For Visual Studio (any version) in Windows 7
Choose Start, and then choose All Programs, Microsoft Visual Studio, Visual Studio Tools, Visual Studio Command Prompt.
Starting with Visual Studio 2010, you may see multiple command prompts, depending on the version of Visual Studio and any additional SDKs you've installed. For example, 64-bit versions of Visual Studio provide both 32-bit and 64-bit command prompts. (The 32-bit and 64-bit versions of most tools are identical; however, a few tools make changes specific to 32-bit and 64-bit environments.)
If you have the Windows SDK or Windows Phone SDK installed, you may see additional command prompts for ARM, x86, or x64 architectures. Check the documentation for the individual tools to determine which version of the command prompt you should use.