Detect if a mousewheel is scrolling and what direction it is scrolling

How can i do this? Any ideas? Thanks

Try this:

if(Input.GetAxisRaw("Mouse ScrollWheel") > 0)
{
    //wheel goes up
}
else if(Input.GetAxisRaw("Mouse ScrollWheel") < 0)
{
    //wheel goes down
}

Looking at the script reference is a great value: Input.mouseScrollDelta