any way to change mouse scroll wheel zooming direction

[mh10]

Hi

Our mac app has strange zooming behavior when using a mouse wheel, scrolling up zooms out, scrolling down zooms in. This is the opposite of how it works on other platforms and also different from other mac apps like Google Earth.

I think it kind of makes sense to zoom this way conceptually but its different from everything else so we would like to reverse it. 

thanks