get back to the initial (focused) window: as we do have this style,
GetNextDlgTabItem() will leave this window and continue in its parent,
but if the parent doesn't have it, it wouldn't recurse inside it later
get back to the initial (focused) window: as we do have this style,
GetNextDlgTabItem() will leave this window and continue in its parent,
but if the parent doesn't have it, it wouldn't recurse inside it later