MFC中Edit Control值的获取与赋值

void CEditControlDlg::OnClickedButton()
{
    // TODO: Add your control notification handler code here
    //获得EDIT 
    CEdit* pBoxOne; 
    pBoxOne = (CEdit*) GetDlgItem(IDC_EDIT); 
    //赋值 
    //pBoxOne-> SetWindowText( _T("FOO ") ); 
    //取值 
    CString str;
    pBoxOne-> GetWindowText(str); 

    MessageBox(str,_T("程序运行结果"),MB_OK);
    str.ReleaseBuffer();
}