with Window_Io;
package Display_Tools is
    Output_Window : Window_Io.File_Type;

    Input_Window : Window_Io.File_Type;
    procedure Open_Output;
    procedure Close_Output;
    procedure Open_Input;
    procedure Close_Input;
    procedure Delete_Window;

    procedure Erase;

    procedure Label_Window (Label : String);

    function Query (Prompt : String; Line : Positive; Column : Positive)
                   return String;

end Display_Tools;