GetRichEditCtrl: identifier not found

hey guys,what should i include to solve that?
i already included
#include "stdafx.h"
#include "MFCApplication4.h"
#include "MFCApplication4Dlg.h"
#include "afxdialogex.h"
#include "afxrich.h"
#include "afxcmn.h"
thanks
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