(Modifying the question)I have a windows form app in C# which calls into some C++, and I need to add logs that log to some window in visual studio(output tab or the ‘immediate window’ tab….I don’t care which.
I had this post but none of those solutions worked…..
how to log in win32 c++ to the visual studio output window?
A comment below mentions I can turn debugging on, but there is no “debug tab”, there are no tabs whatsoever so I am not sure how to enable debugging in the following picture…

thanks,
Dean
On your C# EXE project, not your C++ project. Right-click the C# project, Properties, Debug tab: