is the version identifier for the Microsoft C++ compiler (MSVC) toolchain that shipped with Visual Studio 2017 (Version 15.0). It is the successor to the v140 toolset (Visual Studio 2015) and the predecessor to v142 (Visual Studio 2019).
Large enterprise applications often take years to upgrade. If a project was created in Visual Studio 2017, upgrading to v142 or v143 requires changing the platform toolset and potentially refactoring code to handle breaking changes. Many teams choose to stay on v141 to maintain stability.
To detect v141 in a build script:
: A hallmark of v141 is its full binary compatibility with v140 and subsequent v14x toolsets. You can link libraries built with v140 into a v141 project without needing to recompile them.
When you build a C++ project in Visual Studio, the IDE uses a specific set of compilers, libraries, and build tools. Each major version of Visual Studio introduces a new toolset to handle improvements in C++ standards, optimization, and security. visual studio v141
Understanding the relationship between version mappings avoids target mismatching:
For new C++ projects, use v143 (VS 2022). For existing v141 projects, plan migration to v142 or v143 before the end of extended support (2027). is the version identifier for the Microsoft C++
The primary purpose of v141 is to compile C, C++, and C++/CLI code for Windows applications, libraries, and drivers, while providing improved C++17 conformance, build performance, and tooling compared to earlier versions.
The specific _MSC_VER macro value changes with each update to VS 2017: If a project was created in Visual Studio