Programmability Show and Hide

Example of a form utilising the show and hide option on a control


In this example, the mobile phone (cell phone) field will be hidden on a form if the contact already has a mobile phone number saved, and will show if the mobile phone field is empty.
The control used is a simple text box

To meet the requirement of the control, the IQA query must return a result if the Mobile Phone field is empty

IQA Filters & Display
The filter will return data if the ID of the contact record is equal to the SelectedID and the Mobile Phone field is empty. 
Therefore,  the display is returning the ID, not the Mobile Phone.  Whenever possible, the query should be written to ensure only one row of data is returned

Form - when record has a mobile phone number


And when the mobile number is removed