ONLINE HELPFOR WINDEV, WEBDEV AND WINDEV MOBILE
Number of elements selected in the specified list box (or combo box). This parameter:can be greater than 1 for multi-selection list boxes, is equal to 1 if the combo box is not editable or if the combo box is editable and if an element is selected,is equal to 0 if the combo box is editable and if 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 (or Combo Box) control to which the current process belongs is returned. The name of List Box (or Combo Box) control to use must necessarily be specified.
Last update: 04/25/2018
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All you have to do is configure your product as follows: