vc++读取edit的值及赋值

/*
*读取edit的值及赋值
*/
void CMFCSQLDlg::OnButton4()
{
// TODO: Add your control notification handler code here
SetDlgItemText(IDC_EDIT1,"11");//可以清空
SetDlgItemText(IDC_EDIT2,"22");//可以清空

CWnd*  pWnd = GetDlgItem(IDC_EDIT1);
CString   str;  
pWnd->GetWindowText(str);
 
CString str1;
GetDlgItemText(IDC_EDIT2,str1);

AfxMessageBox(str);
AfxMessageBox(str1);
}