When AddLocationButton is clicked, we make our address data entry visible (using screen arrangement), allowing user to enter address. The blocks to make these actions work are here: We use AddLocationButton to add a new address, CancelButton to cancel the process of adding, and LocationHelpButton to display what type of addresses can be entered. If no data, then we just use an empty list. In the procedure, we also check our database to find out if there are any stored addresses. Some of these settings could have been done from the design editor, but for demo purpose and clarification, we are using a procedure. The procedure sets up the initial state of some of the components. We now create a procedure that can be invoked when the app is started (initialized).
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