dll2def
DEF file creator from Windows 32/64 bits DLLs
... and tested using Qt Creator, however, it could be easily integrated to another IDE, because it essentially consists of three files: main.cpp, DllExportedSymbols.cpp and DllExportedSymbols.h
The idea of this project was taken from pasztorpisti on his post in https://www.codeproject.com/tips/133747/checking-for-exported-symbols-functions-in-a-dll-w.