How do we tell if a C++ application is launched as a Windows service?

Question

We have a console app which we launch from command prompt for debugging, but we also launch this as an NT service for production.

Right now, the code has this logic:<

Answer 1

Would checking a user account help you? IIRC a service would be run as system account or something very similar and I assume you run your application in debug mode under your normal user account. I think OpenProcessToken and GetTokenInformation with TokenUser functions would help here.