Th Visual Studio command prompt is a convenient way to access the command line tools that ship with the .NET Framework SDK and, if installed the, Windows Platform SDK tools.
By providing the Visual Studio command prompt Microsoft allows you to run these tools without requiring your PATH, INCLUDE, LIB and LIBPATH environment variables to contain all the additional paths to the various folders where Visual Studio and the .NET SDK are installed. Instead these folder references are added on the fly when you start the Visual Studio command prompt allowing you to run the tools.
For example if you open a regular command prompt you cannot run xsd.exe
without changing to the directory "C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin"
. However in the Visual Studio command prompt you can just type xsd.exe /?
and it works.
Please see this page from MSDN for a complete list of the tools provided with Visual Studio 2008 SP1 and details on what they do.