title: store listbox selections in a variable in Qlikview
body: <p>I have a listbox in Qlikview (version 11) with 4 possible values: a, b, c and d.</p>
  
  <p>I need to know when b and c are selected simultaneously from the listbox. What is a good way to do this? (with or without macros)
  Is there a way to put the current selections in a variable, perhaps? </p>
  
  <p>Thank you so much in advance</p>