Re: [PATCH 0/1] MR6620: comctl32: Implement WM_GETOBJECT for buttons.

[Dmitry Timoshkov (＠dmitry)]

Dmitry Timoshkov (@dmitry) commented about dlls/comctl32/button.c:
> InvalidateRect( hWnd, NULL, FALSE );
>          break;
>
> +    case WM_GETOBJECT:
> +        if ((LONG)lParam == OBJID_QUERYCLASSNAMEIDX)

Is the cast really justified? Does it imply that 64-bit LPARAM could contain anything in upper 32-bits?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6620#note_84113