I already try the -lshlwapi in the WEL.ecf file. But, when I try to precompile Vision2 or WEL, it gave me the following compilation error:

 # c:\Program Files\Eiffel Software\EiffelStudio 7.0 GPL\gcc\windows\mingw\bin\ld.exe: cannot find -lshlwapi

I try to edit the makefile of the precompilation to add the following option in the ld command to create precomp.lib (upload file makefile2).

 # -L"C:\Program Files\Eiffel Software\EiffelStudio 7.0 GPL\gcc\windows\mingw\i686-w64-mingw32\lib"

After that, the precompilation succeeded, and the compilation of the Vision2 project succeeded too. But when I launch the application, I've got a library entry point error. I send you the error in french (upload file error2.png).