I assume you have dark basic (classic) and not pro... if you bought dark matter you should have it's latest version since the update was on the CD (or maybe from other sources). The update added some new DLL (dynamic link library) commands:
- load DLL
- delete DLL
- call DLL
you can write a DLL using C++, then load the DLL into your dark basic project and call any function you previously wrote in C++ within that DLL. You will have to learn how to make DLL's though, check out
ianM's site, there should be something useful in there to get you started out.