how to update string in a text uicontrol when clicking a checkbox

How should i realize that the string in the text uicontrol will automatically update when the checkbox is clicked.

function [] = gui_test()
% click a checkbox puts the string in a textbox.

S.fh = figure('units','pixels',...

    'position',[300 300 600 400],...

    'menubar','none',...

    'name','test',...

    'numbertitle','off',...

    'resize','off');

S.cb = uicontrol('style','checkbox','string', 'water',...

    'units','pix',...

    'position',[200 300 100 30],'Callback',{@cb_Callback});

S.tx = uicontrol('style','text',...

    'unit','pix',...

    'position',[200 100 180 30]);

   function cb_Callback

   set(S.tx,'String',get(S.cb,'String'));  

   end

end

Thank you for your help.

[Walter Roberson]

When you use ... as the continuation marker, the next line cannot be empty or consist of comments only. If that next line does not finish the previous then there must be at least a continuation marker.

[Chong Tao]

I added the empty lines to show them as code on this web. The real code doesn't have this problem.

Answer 1

[Walter Roberson]

Add another 'end' statement at the end of what you have, so that there is an 'end' for cb_Callback and another end for gui_test() but which is after the 'end' for cb_Callback.

[Chong Tao]

thanks for pointing that out! it's still not working though.

[Walter Roberson]

What result are you getting when you try?

[Chong Tao]

no response in the text box.

Answer 2

[Chong Tao]

can anyone please help with this question? Thanks