How do I automatically update the text in an edit box?

2013 4 18
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So i have a variable totalMax that updates every time a check box is checked. There are 9 check boxes, and each update the table in certain ways, which then updates totalMax. (this happens in a seperate function I wrote, and each checkbox call back function executes it).
Currently I print totalMax into a string using sprintf and then save it into an GUI object = using this function:
function handleNewMax(handles, new_max)
handles.maxCap = new_max;
guidata(handles.output, handles);
And in the edit box call back function i do this:
handles = guidata(handles.output);
set (hObject, 'String', handles.maxCap);
It works out fine and everything. BUT it only will update if i press enter in the box. Is there a way to have the text box automatically update, specifically if I update totalMax? (or teh string i put it in)?
Thanks

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Hannah
Hannah 2013-4-19

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OH i just realized, it is simpler that i thought it was. So i have been looking for solutions to this problem and it seemed so simple just put 'set(handles.edit3, 'String', Maxcfs_str)' but there were issues. But I put this in a function I wrote,and there were issues accessing handles.edit3. BUT if I pass in hObject, eventdata, and handles, into the custom functio i wrote, the set function works fine.

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