Which hook is executed on thread update?

[cyprian.pl]

Hello,

I'm new on this forum so let me say 'hi' first :)

I would like to use a hook that is executed every time a thread data is updated. Where I could find some details which hook I should use [is it threadmanage_update?] and how to get updated thread's data?

Is this hook [threadmanage_update, if it's the right hook to use] executed each time thread data is updated? Even when using data manager from outside script?

I'm especially interested in executing my code when replies count for a thread changes [from within vBulletin itself and also from external scripts when I add posts using vB_DataManager_Post].

Thank you for help in advance!