How do I prevent iPhoto from opening

Every time I plug my iPhone in to sync or recharge? It opens even when there are no photos to import and it's just something I have to close all the time. TIA

Edited to add: I went into image capture and changed "Connecting this phone opens" changed from iPhoto to no application. Does this mean that when I actually have made some photos with my camera, I will have to manually add them?? Not quite clear and would appreciate any advice. TIA

Firstly the reason iPhoto was opening when you plugged your iPhone in even though you had "no photos" was because you (probably) had a video on the phone. iPhoto handles those too.

Second, the change you made only means you will from now on have to open iPhoto manually when you have pictures you want to import. Once opened, iPhoto will give you the same import options it did before.

Nope, can't find any video on the phone. Can't find anything that would "make" it open. Thanks for your reply