[Bug 47075] 32-bit LAVFilters 0.74.x installer fails to register 64-bit AX codec/filters in Wow64 environment (32-bit regsvr32.exe needs to support 64-bit dll registration and vice versa by re-exec with proper bitness)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47075

--- Comment #6 from Vincent Povirk  ---
We can't assume that ERROR_BAD_EXE_FORMAT indicates wrong CPU architecture. We
want to avoid infinite recursion if we attempt to re-exec in both directions.

If we have a way to read the architecture from a PE image, we could check
whether the dll architecture matches the exe, and if not check it against
rundll32.exe in sysnative and syswow64.