Re: [PATCH v5 0/6] MR4140: uxtheme/tests: Add some tests for OpenThemeData() with various app/class names.

[Dmitry Timoshkov (＠dmitry)]

> > +    hTheme = OpenThemeData(hWnd, L"dead:beef;explorer::treeview");
>
> Sorry if I gave you the wrong suggestion. But we should use :: between dead and beef.

Using "dead::beef" instead of "dead:beef" makes OpenThemeData() call to fail
under Windows. Under Wine (after adding support for parsing "app::class") this
call succeeds. It looks like OpenThemeData() should fail when first element
contains invalid data, however I believe that fixing this case doesn't belong
to this MR, it already starts to include not related things like fixing
SetWindowTheme/OpenThemeData sequence.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/4140#note_50619