[Animor]

Originally Posted by ForeverTheGM Try looking at WoW's UI source code.

I did look there... and I've tried the functions there, but per my understanding they return valid data only when you enter an instance or search for available one. When I tried to use for example GetInstanceLockTimeRemainingEncounter during LFR/LFG, I got false for "isKilled", even though some of the bosses were dead at that time.
Perhaps I'm missing something there...?