Microsoft Visual Studio Tools For Applications 2015 Language Support Now
The cornerstone of VSTA 2015’s language support is its exclusive reliance on the .NET Framework 4.6. This decision fundamentally shapes its linguistic capabilities. Unlike its predecessor, VBA, which was a single-language environment, VSTA leverages the Common Language Runtime (CLR). Consequently, the supported languages—VB.NET and C#—are not merely distinct syntaxes; they are first-class citizens of the same managed execution environment. This allows developers to write macros, add-ins, and custom workflow activities in either language and have them interoperate seamlessly. A user could write a data transformation routine in VB.NET and call it from a UI automation script written in C# within the same host application, provided both compile to Intermediate Language (IL). This interoperability is a powerful feature, yet it is contingent on the two supported languages, reinforcing a pragmatic, curated ecosystem.
The selection of VB.NET and C# over other .NET languages (such as F# or managed C++) is a strategic decision driven by Microsoft’s target audience. VB.NET was chosen to provide a migration path for millions of existing VBA developers. For them, the syntax remains familiar—event handlers, Dim statements, and Sub / Function blocks—while the underlying object model shifts from COM-based to .NET-based. This lowers the cognitive barrier for legacy Office and AutoCAD customizers transitioning to more modern platforms. Conversely, C# inclusion targets professional software engineers who require fine-grained control, type safety, and advanced features like lambda expressions, LINQ (Language Integrated Query), and asynchronous programming ( async/await ). By offering these two languages, VSTA 2015 serves two distinct user personas: the power-user-turned-customizer and the seasoned developer. The cornerstone of VSTA 2015’s language support is
In conclusion, the language support in Microsoft Visual Studio Tools for Applications 2015 is a masterclass in focused pragmatism. By supporting only VB.NET and C#, Microsoft deliberately sacrificed polyglot diversity in favor of clarity, backward compatibility, and runtime robustness. VB.NET serves the vast installed base of VBA customizers, while C# attracts professional developers seeking modern language features. Together, they leverage the full power of the .NET Framework 4.6, ensuring that host applications can be extended reliably. For organizations deploying VSTA 2015, the message is clear: automation is best achieved not through a proliferation of languages, but through the disciplined use of two complementary, powerful, and well-supported dialects of the .NET ecosystem. Consequently, the supported languages—VB