Specifications

Renaming Application Files and Tags
2-23
When you save or activate the figure, GUIDE changes <automatic> to
untitled('pushbutton6_Callback',gcbo,[],guidata(gcbo))
If you want to change the name of a callback, you must also change the string
assigned to the
Callback property. This picture shows what you must change
the string to after you rename the callback subfunction to
Closebutton_Callback.