Visual C++ 2015-2019 运行时库，即 Microsoft Visual C++ 2015-2019 Redistributable。将 VC2015~VC2019 开发的应用程序部署到其它未安装 VC2015~VC2019 的计算机时，需要安装该运行时库。

该运行时库可以同时支持 VC2015、VC2017、VC2019。

同时，当系统提示缺少以下 dll 时，也需要通过安装该运行时库解决：

api-ms-win-core-file-l1-2-0.dll
api-ms-win-core-file-l2-1-0.dll
api-ms-win-core-localization-l1-2-0.dll
api-ms-win-core-processthreads-l1-1-1.dll
api-ms-win-core-synch-l1-2-0.dll
api-ms-win-core-timezone-l1-1-0.dll
api-ms-win-core-xstate-l2-1-0.dll
api-ms-win-crt-conio-l1-1-0.dll
api-ms-win-crt-convert-l1-1-0.dll
api-ms-win-crt-environment-l1-1-0.dll
api-ms-win-crt-filesystem-l1-1-0.dll
api-ms-win-crt-heap-l1-1-0.dll
api-ms-win-crt-locale-l1-1-0.dll
api-ms-win-crt-math-l1-1-0.dll
api-ms-win-crt-multibyte-l1-1-0.dll
api-ms-win-crt-private-l1-1-0.dll
api-ms-win-crt-process-l1-1-0.dll
api-ms-win-crt-runtime-l1-1-0.dll
api-ms-win-crt-stdio-l1-1-0.dll
api-ms-win-crt-string-l1-1-0.dll
api-ms-win-crt-time-l1-1-0.dll
api-ms-win-crt-utility-l1-1-0.dll
api-ms-win-eventing-provider-l1-1-0.dll
ucrtbase.dll