上述是VIsualc++ 数字图像处理一书的源码

				// Zoomdlg.cpp : implementation file
				//
				
				#include "stdafx.h"
				#include "demo.h"
				#include "Zoomdlg.h"
				
				#ifdef _DEBUG
				#define new DEBUG_NEW
				#undef THIS_FILE
				static char THIS_FILE[] = __FILE__;
				#endif
				
				/////////////////////////////////////////////////////////////////////////////
				// Zoomdlg dialog
				
				
				Zoomdlg::Zoomdlg(CWnd* pParent /*=NULL*/)
					: CDialog(Zoomdlg::IDD, pParent)
				{
					//{{AFX_DATA_INIT(Zoomdlg)
					m_newHeight = 0;
					m_newWidth = 0;
					m_interpolationSelect = 0;
					//}}AFX_DATA_INIT
				}
				
				
				void Zoomdlg::DoDataExchange(CDataExchange* pDX)
				{
					CDialog::DoDataExchange(pDX);
					//{{AFX_DATA_MAP(Zoomdlg)
					DDX_Text(pDX, IDC_Edit_newH, m_newHeight);
					DDX_Text(pDX, IDC_Edit_newW, m_newWidth);
					DDX_Radio(pDX, IDC_RADIO1, m_interpolationSelect);
					//}}AFX_DATA_MAP
				}
				
				
				BEGIN_MESSAGE_MAP(Zoomdlg, CDialog)
					//{{AFX_MSG_MAP(Zoomdlg)
					//}}AFX_MSG_MAP
				END_MESSAGE_MAP()
				
				/////////////////////////////////////////////////////////////////////////////
				// Zoomdlg message handlers
				
				BOOL Zoomdlg::OnInitDialog() 
				{
					CDialog::OnInitDialog();	
				
					//将原始图像的高显示在ID为IDC_Static_OldH的静态框中
					char szStr[50];    
				    sprintf(szStr, "原图高:%4d 像素",m_oldHeight);            
				    SetDlgItemText(IDC_Static_OldH, szStr);
				
					//将原始图像的宽显示在ID为IDC_Static_OldW的静态框中
					sprintf(szStr, "原图宽:%4d 像素",m_oldWidth);            
				    SetDlgItemText(IDC_Static_OldW, szStr);  
				
					//新图像的大小初始值设置为原图像的大小
					m_newHeight=m_oldHeight;
					m_newWidth=m_oldWidth;
				
					UpdateData(false);
				
					return TRUE;  // return TRUE unless you set the focus to a control
					              // EXCEPTION: OCX Property Pages should return FALSE
				}