https://bugs.winehq.org/show_bug.cgi?id=45417
--- Comment #6 from Silvan s.jegen@gmail.com --- (In reply to Zebediah Figura from comment #5)
Hmm, it seems like it doesn't work on 64-bit for some reason. If your program is 32-bit you could try in a 32-bit prefix.
Currently our program is only 64-bit but I have to compile a 32-bit version anyways. I will do that next week and check that one with windowscodecs in a 32-bit prefix.