Determine highest number in arraylist

I'm trying to figure out how to determine which are the top three numbers returned. I can't figure out how to sort based on the key value (VS,  VB,  LS, etc) instead of the numeric.

 I wanted to put them in an arraylist, I'm guessing

- sort them, by numeric, highest at the top
- pull out the top three, key value (VS, VB, LS, etc)  
- write them to a label

VS = 10
VB = 11
AL = 25
PS = 50
LS=2
SC=100
SL=27 

Dim myArray As Arraylist
'Specificy how many items are in my array
myArray = New ...