Non-MFC DLLs: Overview
Visual Studio 2012
A non-MFC DLL is a DLL that does not use MFC internally, and the exported functions in the DLL can be called by either MFC or non-MFC executable files. Functions are usually exported from a non-MFC DLL using the standard C interface.
For more information about non-MFC DLLs, see Dynamic-Link Libraries in the Windows SDK.
