Vs2005->New->Project
Win32->Win32 Project
On the Wizard, Application Settings, choose DLL radio box, hit finish.
This is all great, except when you build it, you just end up with a dll. How do you use the dll in another project?
Add a Module-Definition File (.def) – call it Export.def
next time you build, there will be a “.lib” file avail so you can link in the dll with another project.
You can add a EXPORTS section to export functions. The LIBRARY secion is added for you automatically. Have Fun with your new Win32 dll!
Steve Novoselac's Blog 
One reply on “HowTo: Make a Win32 DLL without MFC and ATL”
Generally speaking, you can skip the separate def file by using extern “C” blocks around your function declarations. Since only C linkage is allowed in dlls, this tells the compiler that the function is really a C function (not just a global C++ function) and so it will automatically export.
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