VC VARS

v143 with Windows 7 support

https://github.com/telegramdesktop/tdesktop/blob/dev/docs/building-win.md

%comspec% /k "C:\Program Files\Microsoft Visual Studio\18\Community\VC\Auxiliary\Build\vcvars64.bat" -vcvars_ver=14.44

Predefined macros

https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros

Поддержка WinXP

https://learn.microsoft.com/ru-ru/cpp/porting/features-deprecated-in-visual-studio?view=msvc-170