Re: CDialog

See below

 //BaseDlg.h
 class CBaseDlg : public CDialog
 {
 public:
 CBaseDlg (UINT ID, CWnd* pParent = NULL);

 //{{AFX_DATA(CBaseDlg )
 //}}AFX_DATA

 //{{AFX_VIRTUAL(CBaseDlg )
 protected:
 virtual void DoDataExchange(CDataExchange* pDX);
 //}}AFX_VIRTUAL

 protected:

 //{{AFX_MSG(CBaseDlg )
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
 };
 //{{AFX_INSERT_LOCATION}}

 //BaseDlg.cpp
 CBaseDlg ::CBaseDlg (UINT ID, CWnd* pParent /*=NULL*/)
 : CDialog(ID, pParent)
 {
 //{{AFX_DATA_INIT(CBaseDlg )
 //}}AFX_DATA_INIT
 }

 //ChildDlg.h
 class CChildDlg : public CBaseDlg
 {
 public:
 CChildDlg(CWnd* pParent = NULL);
 //{{AFX_DATA(CChildDlg)
 enum { IDD = IDD_DIALOG1 };
 //}}AFX_DATA

 //{{AFX_VIRTUAL(CChildDlg)
 protected:
 virtual void DoDataExchange(CDataExchange* pDX);
 //}}AFX_VIRTUAL

 protected:

 //{{AFX_MSG(CChildDlg)
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
 };

 //ChildDlg.cpp
 CChildDlg::CChildDlg(CWnd* pParent /*=NULL*/)
 : CBaseDlg(CChildDlg::IDD, pParent)
 {
 //{{AFX_DATA_INIT(CChildDlg)
 //}}AFX_DATA_INIT
 }

 void CChildDlg::DoDataExchange(CDataExchange* pDX)
 {
 CBaseDlg::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CChildDlg)
 //}}AFX_DATA_MAP
 }

 BEGIN_MESSAGE_MAP(CChildDlg, CBaseDlg)
 //{{AFX_MSG_MAP(CChildDlg)
 //}}AFX_MSG_MAP
 END_MESSAGE_MAP()

AliR.