It's not LVNI_FOCUSED or LVNI_SELECTED but it's highlighted when you jump from one list view to another useing TAB button on your keyboard.Now that's a riddle.
Btw this little ridle is a form of question cuz i dont know it myself and i need to know it
My guess is LVIS_DROPHILIGHTED set?
No it is not.
It looks like some undokumented state
It looks like some undokumented state