%带有右键菜单的GUI

 figure('Menubar','none');

 h = uicontextmenu;

 uimenu(h,'Label','A');

 uimenu(h,'Label','B');

 set(gcf,'Uicontextmenu',h);

 %获得当前时间

 datestr(now)

 function varargout = GUI17(varargin)

 % GUI17 MATLAB code for GUI17.fig

 %      GUI17, by itself, creates a new GUI17 or raises the existing

 %      singleton*.

 %

 %      H = GUI17 returns the handle to a new GUI17 or the handle to

 %      the existing singleton*.

 %

 %      GUI17('CALLBACK',hObject,eventData,handles,...) calls the local

 %      function named CALLBACK in GUI17.M with the given input arguments.

 %

 %      GUI17('Property','Value',...) creates a new GUI17 or raises the

 %      existing singleton*.  Starting from the left, property value pairs are

 %      applied to the GUI before GUI17_OpeningFcn gets called.  An

 %      unrecognized property name or invalid value makes property application

 %      stop.  All inputs are passed to GUI17_OpeningFcn via varargin.

 %

 %      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one

 %      instance to run (singleton)".

 %

 % See also: GUIDE, GUIDATA, GUIHANDLES

 % Edit the above text to modify the response to help GUI17

 % Last Modified by GUIDE v2. -Jan- ::

 % Begin initialization code - DO NOT EDIT

 gui_Singleton = ;

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

                    'gui_Singleton',  gui_Singleton, ...

                    'gui_OpeningFcn', @GUI17_OpeningFcn, ...

                    'gui_OutputFcn',  @GUI17_OutputFcn, ...

                    'gui_LayoutFcn',  [] , ...

                    'gui_Callback',   []);

 if nargin && ischar(varargin{})

     gui_State.gui_Callback = str2func(varargin{});

 end

 if nargout

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

 else

     gui_mainfcn(gui_State, varargin{:});

 end

 % End initialization code - DO NOT EDIT

 % --- Executes just before GUI17 is made visible.

 function GUI17_OpeningFcn(hObject, eventdata, handles, varargin)

 % This function has no output args, see OutputFcn.

 % hObject    handle to figure

 % eventdata  reserved - to be defined in a future version of MATLAB

 % handles    structure with handles and user data (see GUIDATA)

 % varargin   command line arguments to GUI17 (see VARARGIN)

 % Choose default command line output for GUI17

 handles.output = hObject;

 handles.ht = timer;

 set(handles.ht, 'ExecutionMode', 'FixedRate');

 set(handles.ht, 'Period', );

 set(handles.ht, 'TimerFcn', {@dispnow,handles})

 start(handles.ht);

 % Update handles structure

 guidata(hObject, handles);

 % UIWAIT makes GUI17 wait for user response (see UIRESUME)

 % uiwait(handles.figure1);

 % --- Outputs from this function are returned to the command line.

 function varargout = GUI17_OutputFcn(hObject, eventdata, handles)

 % varargout  cell array for returning output args (see VARARGOUT);

 % hObject    handle to figure

 % eventdata  reserved - to be defined in a future version of MATLAB

 % handles    structure with handles and user data (see GUIDATA)

 % Get default command line output from handles structure

 varargout{} = handles.output;

 function dispnow(hObject , eventdata, handles)

 set(handles.disptime, 'String', datestr(now));