[Bug 44055] Multiple applications fail to run in Win7+ mode, requiring DWM composition API support to be enabled (Aero Glass, transparent windows)(Affinity Designer 1.x, Electron-based apps using isAeroGlassEnabled API)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=44055

--- Comment #23 from Gijs Vermeulen <gijsvrm at gmail.com> ---
Created attachment 68199
  --> https://bugs.winehq.org/attachment.cgi?id=68199
patch with manifest

(In reply to Zebediah Figura from comment #22) 
> The page for MSDN suggests the cutoff is Windows 8 (i.e. NT 6.2), not 8.1
> (i.e. NT 6.3). If true, just changing the version in that patch wouldn't be
> enough, since supposedly the function should return TRUE if Windows 8 is in
> the manifest, FALSE if not.
> 
> To test this, you'd want to create a manifest, declare *only* windows 8
> compatibility (i.e. no 8.1 or 10), and check if the function returns TRUE.
> If the documentation is accurate, it should. Unfortunately, it also means
> that the implementation needs to do a bit of nontrivial parsing, but at
> least it would look similar to 6719bf2e03.

I tested the attached patch on the testbot. It adds a manifest for the dwmapi
dll that only advertises Windows 8. The result is that the testbot VMs that
returned FALSE before (as seen here
<https://testbot.winehq.org/JobDetails.pl?Key=78963>) still return FALSE (as
seen here <https://testbot.winehq.org/JobDetails.pl?Key=78961>).

The latter testbot run is with the attached patch. Is this convincing enough
that 8.1 is the cutoff?

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