Reason for this Error?

[nandi1225]

illegal use of abstract class('MEikListBoxObserver::HandleListBoxEventL(CEikListBox *, MEikListBoxObserver::TListBoxEvent)')
AddrExAppUi.cpp

[wizard_hu_]

illegal use of abstract class('MEikListBoxObserver::HandleListBoxEventL(CEikListBox *, MEikListBoxObserver::TListBoxEvent)')
AddrExAppUi.cpp

You have not implemented HandleListBoxEventL, though you have included 'MEikListBoxObserver in your inheritance list.

[parikhnirav.aits]

It is also possible that you have implement that method but forgot to include in inheritance.

[aamitgupta]

Hi

This is a virtual function, and must be use in it.