Listpicker Selection

Been trying and researching and cant seem to find a way.

Is it possible to say

When listpicker after picking.
IF Listpicker selection = Selection 3
Then set text box to Selection 3

Is there a way to just choose the selection on the list picker from the order it drops down instead from the actual text thats in the list picker?

Thanks again,

Rob

Use .SelectionIndex instead of .Selection