Re: [PATCH 0/2] MR3624: win32u: Implement cross-process scrollbar queries.

[Jacek Caban (＠jacek)]

Jacek Caban (@jacek) commented about dlls/win32u/message.c:
> size = sizeof(SCROLLINFO);
>          break;
>      case SBM_GETSCROLLBARINFO:
> +    case WM_WINE_GETSCROLLBARINFO:

You don't need user message packing for internal messages, they should never be dispatched to client.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3624#note_43005