这源代码是书本《visual c++.net MFC 类库应用详解》的

				// ConnectDialog.cpp : 实现文件
				//
				
				#include "stdafx.h"
				#include "Chatter.h"
				#include "ConnectDialog.h"
				
				
				// CConnectDialog 对话框
				
				CConnectDialog::CConnectDialog(CWnd* pParent /*=NULL*/)
					: CDialog(CConnectDialog::IDD, pParent)
				{
					m_nPort = 0;
					m_ClientName = _T("");
					m_ServerIP = _T("");
				
				}
				
				
				void CConnectDialog::DoDataExchange(CDataExchange* pDX)
				{
					CDialog::DoDataExchange(pDX);
				
					DDX_Text(pDX, IDC_PORT, m_nPort);
					DDV_MinMaxInt(pDX, m_nPort, 0, 99);
					DDX_Text(pDX, IDC_CLIENTNAME, m_ClientName);
					DDV_MaxChars(pDX, m_ClientName, 50);
					DDX_Text(pDX, IDC_SERVERIP, m_ServerIP);
					DDV_MaxChars(pDX, m_ServerIP, 255);
				}
				
				
				BEGIN_MESSAGE_MAP(CConnectDialog, CDialog)
				END_MESSAGE_MAP()
				
				
				// CConnectDialog 消息处理程序