Microsoft Visual Studio Express was created in 2005.
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Microsoft Visual Studio has been written in Visual C++ and
Visual C#
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Microsoft has Visual Studio 2005, 2008, and (in beta) 2010. There are also older versions. There is no Visual Studio 2007. (Are you talking about Office 2007?)
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This program is located in the IDE directory of the Visual
Studio directories and varies depending on the version of Visual
Studio you have.
One example is
C:\Program Files (x86)\Microsoft Visual Studio
9.0\Common7\IDE\vsta.exe
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Visual Studio Express is a piece of software manufactured by
Microsoft. It may be purchased from their online store featured on
the Microsoft website.