How to switch weapon system by (Mouse scroll wheel)

Everynone,

Thanks for your help, the info provided really got me moving, I do have a couple of bugs unfortunately I need help with, for my experience is still in beginner. I have 3 weapons and 3 different animations. I can only carry two weapons and I want to switch between the two weapons I am carrying, is there some thing I can implement to the code I have in the photo