Re: [PATCH v9 0/4] MR9519: dlls/twain_32: Offer TWAIN DSM as twaindsm.dll for 64 Bit and send DAT_ENTRYPOINT earlier.

[Esme Povirk (＠madewokherd)]

Esme Povirk (@madewokherd) commented about dlls/twaindsm/twain32_main.c:
> pSource->ui_window = ((TW_USERINTERFACE*)pData)->hParent;
>          }
>
> +        if (DG == DG_CONTROL &&
> +            MSG == MSG_REGISTER_CALLBACK &&
> +            (DAT == DAT_CALLBACK || DAT != DAT_CALLBACK2) &&

I think you probably want both of these to be `==` checks?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9519#note_124594