How to use a 3rd party DLL in a C++ DLL project?

Question

In Visual Studio 2015, how do I properly set up a C++ DLL project that in turn refers to a 3rd party DLL (also implemented in C++)? I cannot add the 3rd party DLL to the references as it seems for a DLL project the "Browse..." option in the "Add reference..." window is missing (as opposed to the "Add reference..." window of an EXE project where there is such a "Browse..." button). As a consequence I cannot build the project. Is there another way to add that reference? Thanks for helping!