Sorry c.h.r.i.s, I can't offer you much help with build issues using compilers other than ones I've use on a regular basis (which is limited to Visual C++). Someone who uses your compiler might end up posting on this forum but I expect you're much more likely to get help on mingw forums.
A quick look around some of the mingw forums suggests that Visual C++ import libraries (which is what the *.lib version of *.dll is) are not compatible with mingw (or other gcc on Windows ports). It appears you will need to build a compatible import library using some tools that come with your compiler. Of course, I could be completely mistaken.