GtkEntry operation

[naval kishor <naval_5295 yahoo co in>]

Hi,
  I've developed an application with gtk+-2.8.18 version.Application is like
that there are three entry field and in all the three field i can enter the
number but i require some validation on entered number but problem is that
validation should happen after focus goes out from all the three entry field .
  i have override a function  gtk_field_entry_focus(GtkWidget  
                                                              *widget,GtkDirectionType direcction);
but  it validate the values when focus moved from one entry field to another entry  field.
  So i want to advice to all that what functionality i have to apply for resolve this problem.....
thanks for replying  in advance.
  
Thanks and Regards 
Naval

                                
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