Historically, every version of Visual Studio shipped with its own specific version of the CRT (e.g., MSVCR100.dll for Visual Studio 2010). This created "DLL Hell," where users had to install dozens of "Microsoft Visual C++ Redistributables" to run different apps.
The _s functions feel heavy-handed. They invoke an "invalid parameter handler" (which often crashes the program) instead of just returning an error. Many cross-platform developers avoid them, preferring strlcpy or manual checks. microsoft c runtime
When compiling a program, a developer must choose how to include the CRT. This choice has massive implications for file size, performance, and deployment. Historically, every version of Visual Studio shipped with
Since UCRT, UTF-8 locale is fully supported as a “code page” locale (e.g., setlocale(LC_ALL, ".UTF8") ). and deployment. Since UCRT