Help making dll's in Dev C++

[Robomaniac]

Does anyone here have experience in programming dll's using dev c++. I'm having trouble. I've just done the example sourcecode, compiled it, which it did alright, went to my client application, linked to the lib, and included the header, but i get :

Linker Error : Undefined reference to DllClass::DllClass

and the same for the constructor. Thanks in advance