Hello, I have produced a linker error in Visual C++ and it seems I lack the wits to resolve it. So, do anyone here have any suggestions? What I want to do, is to have one workspace with two projects. In the first project I define the class "GUIMouse". Then I include the header file of this class in the second project. All source/header files for both projects are located in the same directory. Now, when I compile the second project that has GUIMouse as an external dependency I recieved this: (...)SecondProject.obj : error LNK2001: unresolved external symbol "public: __thiscall GUIMouse::GUIMouse(void)" (??0GUIMouse@@QAE@XZ) ReleaseSecondProject/SecondProject.exe : fatal error LNK1120: 3 unresolved externals. I recieved one LNK2001 error for every GUIMouse member function I used. What am I missing? Any help would be appreciated. /Anomaly Engine I