I’m watching a tutorial and they said that you need to setup the programming application to run the plugin in a DAW, but didn’t say how to do it in Visual Studio. How do I do that?
Right click on a project ( like projectName_VST3 ) you want to run in a DAW for debugging and select Properties, then in a Configuration Properties go to Debugging. You will see Command → $(TargetPath). In a TargetPath dropdown choose Browse to pick your DAW (.exe)
Also I suggest setting up some environment variables for your DAWs like ABLETON_PATH, REAPER_PATH etc.