ui.Dialog.setActionActive
Enabling and disabling dialog actions.
Syntax
setActionActive(
  name STRING,
  active BOOLEAN ) - name is the name of the action, see Identifying actions in dialog methods.
 - active is a boolean value.
 
Usage
Use the 
setActionActive() method to enable or disable an
 action.CALL DIALOG.setActionActive("zoom", FALSE)The second parameter of the method must be a boolean expression that
 evaluates to 0 (FALSE) or 1 (TRUE).