vc++中的问题，请哪位达人看看

// area2.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "area2.h"
#include "area2Dlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CArea2App

BEGIN_MESSAGE_MAP(CArea2App, CWinApp)
//{{AFX_MSG_MAP(CArea2App)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG
ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CArea2App construction

CArea2App::CArea2App()
{
// TODO: add construction code here,
// Place all significant initialization in InitInstance