Setting focus to text entry box in Storyline

Thanks, Peter, but that's not quite what I'm looking for (though I do like the zoom region feature).  Perhaps a screenprint will illuminate.

Ordinarily, a cursor would be active on the screen, and the user enters the number of the submenu desired.  I want to mimic this action by use of a text entry box and a variable, but I can't make that operative without the user clicking in the text entry box first.  I would like the focus to be on the text entry box from the start of the timeline for the slide.  A similar query last year, but related to Quizmaker, was answered negatively: http://community.articulate.com/forums/p/5291/29013.aspx#29013