Return selected item of option menu

[Kaveh Bazargan]

This must be easy, but I can't find it!

I have an option menu with 3 lines in the content:

choice 1
choice 2
choice 3

I want to get the selected item. What is the command for that? when I type

put btn myButton

I get all three lines

When I ask for selectedLine, I get

line 3 of button 8

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Also, is there a handler to test when the selection of the button has been
changed? i.e. like MenuPick, but only if the menu item picked is different
to the one there previously.
-- 

Kaveh Bazargan
http://www.focalimage.com/
http://www.holographer.org/