in reply to Re^3: How to determine if nothing is selected in a listbox (only select actually clicked element) with bbox
in thread How to determine if nothing is selected in a listbox

lol, see Re: How to determine if nothing is selected in a listbox (only select actually clicked element), see Tk::WidgetDump, and examine the bindings 
 perl -e " use Tk; tkinit()->WidgetDump; MainLoop "

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double click on an item in the WidgetDump tree, when the window pops up, scroll down to find the "Show bindings" button and click it
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