Sets the "cursor" position used by other CombatLog functions. Information about the entry at the "cursor" position can be retrieved with CombatLogGetCurrentEntry(). That function then advances the cursor to the next entry, so calling it repeatedly returns all information in the combat log -- this function can be used to "rewind" the combat log to retrieve information about earlier events.

The argument index can be positive or negative: positive indices start at the beginning of the combat log (oldest events) and count up to the end (newest events); negative indices start at -1 for the newest event and count backwards to to -CombatLogGetNumEntries(ignoreFilter) for the oldest.