A question about Dialog

[nnvkct]

Hi, everyone. I'm a newbie in C++. I have a program that create a simple dialog.

// Filename: test31.CPP

#include <afxwin.h>
#include "Resource.h"


class DialogApp : public CWinApp
{
public:
	BOOL InitInstance();	
};

class CExoDialog : public CDialog
{
public:
	enum { IDD = IDD_DIALOG1 };

	CExoDialog();
};

CExoDialog::CExoDialog()
	: CDialog(CExoDialog::IDD, NULL) /// May I replace IDD by IDD_DIALOG1?
}


BOOL DialogApp::InitInstance()
{	
	CExoDialog Dlg;
	m_pMainWnd = &Dlg;
	Dlg.DoModal();

	return TRUE;
};

DialogApp theApp;

//End of test31.CPP

-------------

//Filename: resource.h
//{{NO_DEPENDENCIES}}
// Microsoft Developer Studio generated include file.
// Used by Script1.rc
//
#define IDD_DIALOG1                     101
#define IDC_PROGRESS1                   1000
#define IDC_IPADDRESS1                  1001
#define IDC_EDIT1                       1005
#define IDC_ANIMATE1                    1006
#define IDC_SLIDER1                     1007
#define IDC_BUTTON1                     1008
#define IDC_CHECK1                      1009

// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        102
#define _APS_NEXT_COMMAND_VALUE         40001
#define _APS_NEXT_CONTROL_VALUE         1010
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

-------------
When I replace IDD with IDD_DIALOG1, I get some errors:error C2589: 'constant' : illegal token on right side of '::'. Why?

[laserlight]

You might want to describe what errors you got.