https://bugs.winehq.org/show_bug.cgi?id=26803
--- Comment #13 from super_man@post.com --- I have no idea how it works, but based on your analyze I think the correct way to do the calls is only when the button open is pressed then it would "validate" the selected file(s).
I don't know if its possible. It doesnt make sense to everytime a file is selected, but not opened make a some system call.