title: How to profile "external" DLL code in Visual Studio 2015
body: <p>I have a DLL that I've built using a separate solution/project that I've embedded into my project.  When profiling CPU speed, I find that the DLL marked as "external code" is a considerable contribution to the overall slowness of my program.  Is there any way I can get the profiling to descend into that external code so I can find out what is going on?</p>