Rémi Bernon (@rbernon) commented about dlls/user32/tests/msg.c:
{ WM_MOVE, sent }, { HCBT_ACTIVATE, hook|optional }, /* Probably shouldn't happen, but not part of this test */
- { EVENT_SYSTEM_FOREGROUND, winevent_hook|wparam|lparam|optional, 0, 0 },
Fwiw it's a bit confusing that this is added here, where the event is implemented, and not before.