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?