[SOLVED]noob needs help with code

im making a calculator and i have only been using visual studio 2010 for less then a week so im still learning

anyways what im trying to do is when you click a button i want it to sort through the array ive made for example:

nums1(0) = 1

nums1(1) = 11

nums1(2) = 111

nums1(3) = 1111

for each click move up one in the array please help