Yahoo finance API stock past values
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I'd like to get past values of stocks using the Yahoo finance API.  
I found this article: http://www.codeproject.com/Articles/37550/Stock-quote-and-chart-from-Yahoo-in-C  
but I can only get the stock's latest value.  
Does anybody know if it is even possible to get a stock's value by date using this API (or any other)?