Hotkeyset & mouse

I'm trying to write a little app which doubleclicks when I rotate the mouse wheel (up or down).
Reading the help section of the manual seems that Hotkeyset takes only keyboard inputs
and not mouse ones.

Therefore I can't write for example:

HotKeySet("MouseWheelup", "DblClick")

Func DblClick()
.....
EndFunc

Can someone help me pls?

tnx