Textbox dates to 2 Labels

Say If got these dates in a TextBox
2010/06/19,2010/06/20,2010/06/21,2010/06/22,2010/06/23,
i want automicly my Start label to pickpup the lowest date  and Label End to pickup  the highest Date

 Start: [2010/06/19] End: [2010/06/23]
between brackets is my label

Thanks for any Help

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