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1. You need to build/format a string prior to outputting it with MessageBox:


CString msg;
msg.Format(_T("Camera USB driver version : %s\n"), instr.version_cam_driver); // pretty much the same...

The thing is that the description of requirements is really vague. The original program in a console app. And I cannot see any reason why would MFC be a requirement for a console app.

Okay, I can...

There's nothing wrong in being brand new to something but wanting to do something more than trivial. In general what you need is to stop being brand new and gain some experience enough to accomplish...