title: How to populate installer variables from customized actions to the installation context?
body: <p>I would like to populate programmatically-created installation variables in customized actions to the installation context, in order to use these in the IDE like <code>${installer:myVar}</code> for example.</p>
  
  <p>When I create the variable and set it to the context with <code>getContext().setVariable("myVar", "123")</code>, theses variable do not appear in the <em>Bound Variables</em> tab of the <em>Select Installation Variable</em> dialog as the others do that are set using the <em>Set Variable</em> action. </p>
  
  <p>Is there a way to populate my custom variable so it's visible here?</p>