Evaluating variables

ilgal Community Member Posts: 44
Lectora v. 2006Good morning everyone. I have a variables question. I want to prevent the action from firing if the learner does not complete the entry form field.What is the condition to evaluate if a form entry field is blank? In MS Access, I would use the expression IsNull. In MS Excel, I would use an empty text string of "". What is the comparable notation in Lectora?Thanks for any advice!~Val in cloudy IL