I have a VC++ project in Visual Studio 2008.
It is defining the symbols for unicode on the compiler command line (/D \"_UNICODE\" /D \"UNICODE\"), eve
/D \"_UNICODE\" /D \"UNICODE\"
From VS2019 Project Properties - Advanced - Advanced Properties - Character Set
Also if there is _UNICODE;UNICODE Preprocessors Definitions remove them. Project Properties - C/C++ - Preprocessor - Preprocessor Definition