1. Open "x64 Native Tools Command Prompt" and cd in your working dir
2. Create obj file
cl /EHsc /c .\src\*.cpp /I .\include /Fo".\obj\\"
PS: Don't forget to replace with the good path to your include folder.
3. Create .dll with obj file
link /DLL /OUT:injected.dll .\obj\*.obj .\lib\*.lib