Introduction    Menus
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 AddItem()       Adds a selectionable item to a submenu
 AddLine()       Adds a line to a submenu as a no selectionable item
 DelItem()       Deletes an item of a Submenu
 DispMenu()      Actives a menu that has been previously created
 OffItem()       Deactivates one item of a submenu
 OnItem()        Reactivates an item of a submenu
 NewMenu()       Creates a structure of menu
 READ            New characteristics of the READ command over Radio Buttons