方法四和方法五是关联法，常用到的四个函数：

DoDataExchange();DDC_xxxx();//关联变量DDV_xxxx();//验证变量UpdateData();//UpdateData(TRUE)为从编辑框获取数据，UpdateData(FALSE)为更新数据到编辑框

CMy01_DemoDlg::CMy01_DemoDlg(CWnd* pParent )	: CDialogEx(IDD_MY01_DEMO_DIALOG, pParent)	, m_num1(0)	, m_num2(0)	, m_num3(0){	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINframe);}void CMy01_DemoDlg::DoDataExchange(CDataExchange* pDX){	CDialogEx::DoDataExchange(pDX);	DDX_Text(pDX, IDC_EDIT1, m_num1);	DDX_Text(pDX, IDC_EDIT2, m_num2);	DDX_Text(pDX, IDC_EDIT3, m_num3);	DDX_Control(pDX, IDC_EDIT1, m_edit1);	DDX_Control(pDX, IDC_EDIT2, m_edit2);	DDX_Control(pDX, IDC_EDIT3, m_edit3);}

方法四：

将编辑框与控件变量关联，对控件变量进行操作

void CMy01_DemoDlg::OnBnClickedButton5(){	// TODO: 在此添加控件通知处理程序代码	int num1, num2, num3;	TCHAR ch1[12], ch2[12], ch3[12];	m_edit1.GetWindowText(ch1, 12);	m_edit2.GetWindowText(ch2, 12);	num1 = _ttoi(ch1);	num2 = _ttoi(ch2);	num3 = num1 + num2;	_itot(num3, ch3, 10);	m_edit3.SetWindowText(ch3);}

方法六：

void CMy01_DemoDlg::OnBnClickedButton6(){	// TODO: 在此添加控件通知处理程序代码	int num1, num2, num3;	TCHAR ch1[12], ch2[12], ch3[12];	::SendMessage(GetDlgItem(IDC_EDIT1)->m_hWnd, WM_GETTEXT, 12, (LPARAM)ch1);	::SendMessage(GetDlgItem(IDC_EDIT2)->m_hWnd, WM_GETTEXT, 12, (LPARAM)ch2);	num1 = _ttoi(ch1);	num2 = _ttoi(ch2);	num3 = num1 + num2;	_itot(num3, ch3, 10);	::SendMessage(GetDlgItem(IDC_EDIT3)->m_hWnd, WM_SETTEXT, 0, (LPARAM)ch3);}

方法七：

void CMy01_DemoDlg::OnBnClickedButton7(){	// TODO: 在此添加控件通知处理程序代码	int num1, num2, num3;	TCHAR ch1[12], ch2[12], ch3[12];	SendDlgItemMessage(IDC_EDIT1, WM_GETTEXT, 12, (LPARAM)ch1);	SendDlgItemMessage(IDC_EDIT2, WM_GETTEXT, 12, (LPARAM)ch2);	num1 = _ttoi(ch1);	num2 = _ttoi(ch2);	num3 = num1 + num2;	_itot(num3, ch3, 10);	SendDlgItemMessage(IDC_EDIT3, WM_SETTEXT, 0, (LPARAM)ch3);}