How to apply validation on matlab M-file?

I want to put a warning message box at the click of a close button in a matlab figure.

   function closed(hObject, eventdata)

               close(gcbf);
               warndlg('are you sure you want to close','!! Warning !!')
              %clear all;
              %close;clear

            end

however this warning dialog box appears when the window is closed! Where should I put this messagebox exactly!

Answer 1

[Kaustubha Govind]

Looks like you have your call to warndlg after "close(gcbf)". Try putting it above that.

[Walter Roberson]

And use questiondlg() instead of warndlg(), as warndlg() does not give the user any way to chose between closing or not.