C++:
QUOTE
C++ (generally pronounced /si plʌs plʌs/) is a general-purpose, high-level programming language with low-level facilities. It is a statically-typed free-form multi-paradigm language supporting procedural programming, data abstraction, object-oriented programming, and generic programming. Since the 1990s, C++ has been one of the most popular commercial programming languages.
Bjarne Stroustrup developed C++ (originally named "C with Classes") in 1983 at Bell Labs as an enhancement to the C programming language. Enhancements started with the addition of classes, followed by, among other features, virtual functions, operator overloading, multiple inheritance, templates, and exception handling. The C++ programming language standard was ratified in 1998 as ISO/IEC 14882:1998, the current version of which is the 2003 version, ISO/IEC 14882:2003. A new version of the standard (known informally as C++0x) is being developed.
Visual C++:
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Microsoft Visual C++ (also known as MSVC) is an Integrated development environment (IDE) product for the C, C++, and C++/CLI programming languages engineered by Microsoft. It has tools for developing and debugging C++ code, especially that written for the Microsoft Windows API, the DirectX API, and the Microsoft .NET Framework.
Sources : Wikipedia
C++ is the language, MSVC is a IDE.