Interesting thought. What are you trying to accomplish?
I looked in the registry at the associated key (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule). There's a REG_DWORD value type in there named NextAtJobID. (I think what you find in this key changes depending upon whether Task Scheduler is installed and running.)
I looked at it for a few seconds then decided not to experiment.
Regards,
Jim