| User interface / Window containers | |
 MAIN
    CALL ui.Interface.setName("custapp")
    CALL ui.Interface.setType("child")
    CALL ui.Interface.setText("Customers")
    CALL ui.Interface.setContainer("parent1")
    ...
 END MAIN
Multiple container programs can be used to group programs by application modules.
The client displays a system error and the programs stops when:
MAIN
  CALL ui.Interface.setName("parent1")
  CALL ui.Interface.setType("container")
  CALL ui.Interface.setText("SoftStore Manager")
  CALL ui.Interface.setSize("600px","1000px")
  CALL ui.Interface.loadStartMenu("mystartmenu")
  MENU "Main"
    COMMAND "Help" CALL help()
    COMMAND "About" CALL aboutbox()
    COMMAND "Exit"
      IF ui.Interface.getChildCount()>0 THEN
         ERROR "You must first exit the child programs."
      ELSE
         EXIT MENU
      END IF
  END MENU
END MAIN