I am using Dev-C++ 4.9.8.0. I tried to make DLLs in Dev-C++. Can anyone with kindness tell me where can I get the help materials on making classes in a DLL and use the member functions in my executables? I found many materials spoke on the functions in DLL but few of them spoke on the member functions and classes in DLL. Although the platform gives the skeleton of a C++ DLL,i.e. dllmain.cpp, dll.h,I can not understand it. The help files in Dev-C++ did not explain it explicitly. Maybe a step_by_step turial is useful. I know that is not quite appropriate to ask such question in this area. But after several days of asking problems, I found there are lots of experts here. And I am just a new comer in programing. Does someone know the format of DLL made from Dev-C++ ? Coff or omf ? Can the DLL be applied by Borland C++ builder 2009? If not, how can I handle it? Can the DLL be compatible with Visual C++? Thanks a lot.