App Designer - How to create a callback function for pressing the 'Close Window' Button
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Carlos Acasuso
on 17 Feb 2021
Edited: Carlos Acasuso
on 17 Feb 2021
Hello,
I would like to give the user a warning when certain actions have not been done, such as selecting a number of options from dropdown lists, and the user attempts to close the window by pressing on the 'x' shown below.
How can I create a callback function for this button?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/522702/image.png)
Thanks,
Carlos
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