Member 11201788 wrote: Since the library file(lib provided by client) is statically linked in our C++ static library, does the dll(lib provided by client) also need to be linked/referred in our application. Shouldn't have to... if you load the lib into your dll properly. Member 11201788 wrote: They(client) have provided their .lib and .dll. Can we use only .lib in our C++ static library. Again, should be able to just use the lib, since it's a collection of objects. Only thing that may be a limiter is that you have to use a lib that was compiled with the same compilation settings as your project, since the name mangling of C++ can affect you being able to find your methods. A lot of people tend to do their exports/imports in a C-style format even within C++ in order to avoid C++ name mangling issues.