Mousewheelup/down bindings

[taheen74]

Would like a way to use mousewheel up and mousewheel (including the shift/ctrl/alt functions) down in the bindings editor. Trying to make my healing set up as close to my vuhdo bindings as possible, for example:

Mousewheel up is my healing rain
Mousewheel down is my chain heal
Shift mousewheel up is my earth shield
shift mousewheel down is my water shield

If it's already in there- which one is it considered?

Let's just say I'm LUA-ically stupid and have no idea where I would go to even begin to put these into the code.