is it possible to call a constuctor in a dll?

Question

Hi guys, i have a few classes written in C++ and had them complied into a DLL. i was wondering if there is anyway to instantiate an object by calling the constructor exported by the DLL. Tried but C# doesn't like it, maybe its my lack of knowledge! Do I perhaps need to create a C# wrapper class? thanks in advance. cheers. chong.