hello all
i am a new user in symbian series 60. i want to add listbox in my application. i add this code in in mycotainer.cpp, in mycotainer.h and .rss the following code  

mycotainer.cpp:
TInt resourceId = R_MY_LISTBOX;
TResourceReader reader;
iEikonEnv->CreateResourceReaderLC(reader, resourceId);
iListBox->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy(); // resource pushed in CreateResourceReaderLC

// create listbox scrollbar...
// set icons...

SizeChanged();
iListBox->ActivateL();
DrawNow();  

mycotainer.h:
CEikColumnListBox* iListBox;

.rss:
RESOURCE LISTBOX r_list_listbox {
   array_id = r_list_items;
   flags = EAknListBoxSelectionList;
}

RESOURCE ARRAY r_list_items {
   items =
   {
      LBUF { txt = "\tFirst"; },
      LBUF { txt = "x\tSecond"; },
      LBUF { txt = "\tThird"; }
   };     
}


but it gives   'R_MY_LISTBOX' : undeclared identifier error

i have created a simply application which two menu and two submenu

please anyone give me the directions - how can i solve it



thanks

bashar