[Bug 46254] EnumResourceTypesW should return True if there are no resources to enumerate

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=46254

Maotong Zhang  changed:

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--- Comment #4 from Maotong Zhang  ---
(In reply to Janne from comment #3)
> Created attachment 79049 [details]
> EnumResourceTypesA test code
>
> I made simpple application which calls EnumResourceTypesA.
>
> Application was tested on Wine 10.9 and on Windows 11.
>
> In case callback function returns TRUE. 
> EnumResourceTypesA returns TRUE 
> In Windows11: GetLastError returns 126.
> In Wine: GetLastError returns 126.
>
> If callback function returns FALSE. 
> EnumResourceTypesA returns FALSE.
> In Windows11: GetLastError returns 15106.
> In Wine: GetLastError returns 126.
>
> If callback function pointer is NULL.
>
> In Windows11: 
> EnumResourceTypesA returns FALSE. 
> GetLastError returns: 998.
>
> Wine Crashes.
>
> Source of my test application attached.

In what situations is it necessary to pass NULL to EnumResourceTypes?