I know almost nothing about VBA but I pieced together a macro by copying and
pasting. It currently has a line which applies an autofilter to sort out any
values less than 3:
Selection.AutoFilter Field:=4, Criteria1:="=3", Operator:=xlAnd

I would like to change this from always having a criteria of 3 to allowing
the user to input into an input box any number to filter for. Can someone
please provide an example of how to do this?