How to use CreateObject("System.Collections.SortedList") in VBA

[vnzerem]

I have seen some people use this line of code below in various things like when handling arrays.
CreateObject("System.Collections.SortedList")
Can someone explain to me when we should use it and what it does exactly. I will also prefer web-links or references that can add to the explanation.
Thanks for your time

[jindon]

When extract the list of unique values sorted in ascending order.

http://msdn.microsoft.com/en-us/libr...code-snippet-3

[vnzerem]

Jindon,
Thanks a lot for the link. I am one of your big fans...and I have noticed that you have used it a lot in several scenarios.
Thanks once more