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Number of elements selected in the specified List Box (or Combo Box) control. This parameter:can be greater than 1 only if the List Box control is multiselection,is equal to 1 if the Combo Box control is not editable or if the Combo Box control is editable and if an element is selected,is equal to 0 if the Combo Box control is editable and no element is selected.
Name of List Box (or Combo Box) control to use.If this parameter corresponds to an empty string (""), the number of elements selected in the List Box control (or Combo Box) to which the current event belongs is returned.
Last update: 10/31/2019
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All you have to do is configure your product as follows: