https://bugs.winehq.org/show_bug.cgi?id=51925
--- Comment #4 from O. Nykyforchyn oleh.nyk@gmail.com --- I already did it, but it adds an unnecessary level of complexity, and creates problems, e.g., with treatments of special characters in names and parameters (extra escaping, sometimes rather complicated).
In fact I have written a patch to Wine that allows to do smth like
WINEDROPENVFORUNIX=ComSpec,COMSPEC wine winedt.exe
but I would prefer a stable solution from Wine developers.