MFC通过一个对话框类如何创建多个对话框

对话框类如下

#pragma once
#include "resourceppc.h"
#include "friendname.h"


// TalkingDlg 对话框

class TalkingDlg : public CDialog
{
    DECLARE_DYNAMIC(TalkingDlg)

public:
    TalkingDlg(CWnd* pParent = NULL);   // 标准构造函数
    virtual ~TalkingDlg();
    virtual BOOL OnInitDialog();

// 对话框数据                    
    enum { IDD = Dialog_Talk };

protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持
public:

    static DWORD  RecvProc(LPVOID x);
    BOOL StartThread();
    afx_msg void OnBnCloseOk();
    afx_msg void OnBtnSend();
    afx_msg void OnPaint();
    afx_msg LRESULT TOWriteMSG(WPARAM wParam,LPARAM lParam);

    DECLARE_MESSAGE_MAP()
public:
    CButton *Btn_send;
    CListBox *LST_talking;
    CEdit  *Edt_write;
    CStatic *STT_Imageinfo;
    CStatic *STt_friendname;
    HANDLE m_hThread;
    CString recvstr;
     BOOL targ;
     friendname setName;
};