Force MSVC to export all static library symbols

I have a dll project with some C ++ code inside and a static library linked to my project with a set of headers.

There are no references to my static library functions inside my C ++ code, but I want MSVC to export all static library symbols and I don't know how.

The static lib is in my VS project, but when I compile my project, dumpbin says that only my C ++ functions are exported, there is no trace of my static library.