I'm not an profesional C++ programmer just to be clear. I made my own game engine and I compiled it as Win32 DLL, and engine is using SFML. When I added engine to my GameTest project, I got error "cannot open source file SFML\Graphics.hpp...". Tried making test engine without sfml, and it worked fine. Idk how to use dll which uses another dll, and there is no tutorial on the internet.