How to profile "external" DLL code in Visual Studio 2015

Question

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?

Answer 1

Solution was this:

• add the existing vcxproj from the external sln into my project
• profile
• click the filter box and then check "show external code"
• profit

last one is optional