How does Windows Task Scheduler in Win7 recognize a failed task?

Question

I am working with Windows 7 and I have an application that returns zero (0x0) when successful and one (0x1) on error situations.

I have scheduled this app using Win

Answer 1

Nobody has answered the title question though. It seems as though the task scheduler has no way to detect a failed task? Surely it must have something because it has an option to restart failed tasks!