Current versions of Intel Visual Fortran supply a Fortran development environment based on Visual Studio 2010 Shell. This is not the same as what you would buy from Microsoft as it doesn't have any of the Microsoft languages such as Visual C++ or Visual BASIC. If you already have VS2012 installed, we work with that. We're in the process of negotiating with Microsoft to update the included Shell to either VS2012 or VS2103 for a future release. But from the Fortran perspective, there is no advantage to one over the other.
