How to stop iTunes from starting?

I just upgraded to iTunes 11.1.5.5 yesterday on my laptop (Windows 8) and now every time I plug in my iPhone (to charge it), iTunes launches automatically ... it didn't do this before (thanks Apple). Does anyone know how to disable this auto-launch? I've looked under Edit > Preferences, but didn't find anything. Thanks.
 
Not sure about W8, but on my Vista Home Premium laptop I go to Control Panel>Auto Play & at the bottom it has the options in a drop down menu.
 
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