Matlab - Confirmacion GUI

function varargout = cierre_guidecaballero(varargin)

gui_Singleton = 1;

gui_State = struct('gui_Name',       mfilename, ...

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @cierre_guidecaballero_OpeningFcn, ...

                   'gui_OutputFcn',  @cierre_guidecaballero_OutputFcn, ...

                   'gui_LayoutFcn',  [] , ...

                   'gui_Callback',   []);

if nargin && ischar(varargin{1})

    gui_State.gui_Callback = str2func(varargin{1});

end

if nargout

    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});

else

    gui_mainfcn(gui_State, varargin{:});

end

function cierre_guidecaballero_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = cierre_guidecaballero_OutputFcn(hObject, eventdata, handles)

varargout{1} = handles.output;

function salir_Callback(hObject, eventdata, handles)

opcion=questdlg(' Desea Salir del Software ?','',...

               'Yes','No','cancel ','cancel');

switch opcion,

    case 'Yes'

          close all;

          clc

     case 'No'

     case 'cancel'

end

function CancelarFigura(src,evnt)

% User-defined close request function 

% to display a question dialog box 

   selection = questdlg('¿Desea cerrar la aplicación?',...

      'Close Request Function',...

      'Yes','No','Yes');

   switch selection,

      case 'Yes',

         delete(gcf)

      case 'No'

      return

   end

end