如圖是一個簡單的加法計算器：

void CMy01_DemoDlg::OnBnClickedButton1() { // TODO: 在此添加控件通知處理程序代碼 int num1, num2, num3; TCHAR ch1[12], ch2[12], ch3[12]; GetDlgItem(IDC_EDIT1)->GetWindowText(ch1, 12); GetDlgItem(IDC_EDIT2)->GetWindowText(ch2, 12); num1 = _ttoi(ch1); num2 = _ttoi(ch2); num3 = num1 num2; _itot(num3, ch3, 10); GetDlgItem(IDC_EDIT3)->SetWindowText(ch3); }

void CMy01_DemoDlg::OnBnClickedButton2() { // TODO: 在此添加控件通知處理程序代碼 int num1, num2, num3; TCHAR ch1[12], ch2[12], ch3[12]; GetDlgItemText(IDC_EDIT1, ch1, 12); GetDlgItemText(IDC_EDIT2, ch2, 12); num1 = _ttoi(ch1); num2 = _ttoi(ch2); num3 = num1 num2; _itot(num3, ch3, 10); SetDlgItemText(IDC_EDIT3, ch3); }

void CMy01_DemoDlg::OnBnClickedButton3() { // TODO: 在此添加控件通知處理程序代碼 int num1, num2, num3; num1 = GetDlgItemInt(IDC_EDIT1); num2 = GetDlgItemInt(IDC_EDIT2); num3 = num1 num2; SetDlgItemInt(IDC_EDIT3, num3); }

方法四和方法五是關聯法，常用到的四個函數：

DoDataExchange(); DDC_xxxx();//關聯變量 DDV_xxxx();//驗證變量 UpdateData();//UpdateData(TRUE)為從編輯框獲取數據，UpdateData(FALSE)為更新數據到編輯框

CMy01_DemoDlg::CMy01_DemoDlg(CWnd* pParent /*=NULL*/) : 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); }

将編輯框與整形變量關聯，然後對整形成員變量直接進行操作

void CMy01_DemoDlg::OnBnClickedButton4() { // TODO: 在此添加控件通知處理程序代碼 UpdateData(true); m_num3 = m_num1 m_num2; UpdateData(false); }

将編輯框與控件變量關聯，對控件變量進行操作

void CMy01_DemoDlg::OnBnClickedButton5() { // TODO: 在此添加控件通知處理程序代碼 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); }

void CMy01_DemoDlg::OnBnClickedButton6() { // TODO: 在此添加控件通知處理程序代碼 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); }

void CMy01_DemoDlg::OnBnClickedButton7() { // TODO: 在此添加控件通知處理程序代碼 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); }

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