How do I pick a random text box to put text in? And is it possible to lock the text box so the user can't edit it?

MIT App Inventor Help
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Please see http://www.appinventor.org/bookChapters/chapter21.pdf for procedures, and
http://www.appinventor.org/bookChapters/chapter19.pdf for lists, from the free book at
FAQ Section: Books, Tips, Tutorials for AI2

Also see FAQ Section: Lists

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