turning off ON_TIME

I have an ON_Time routine running. My book is in another county. How do I stop this thing from opening itself up and running. How do I stop a sub that has been set to run On_Time?

Later edit:
Cool down. I figured I could kill the reset start time part of the routine. The weirdness of a closed file opening itself threw me for a bit.

To generalize

if I have a sub

Sub mySub() 
' some code 
Application.OnTime earliesttime:=Now + TimeSerial(0, 0, 10), procedure:="mySub" 
End Sub

What code, in a different sub will tell excel to stop running mySub every 10 seconds.

I also posted this on the other website.