void CQq1Dlg::OnButton1()
{
// TODO: Add your control notification handler code here
UpdateData(TRUE);
CString strMsg;
GetDlgItem(IDC_EDIT1)->GetWindowText(strMsg);
HWND hWnd = ::FindWindow(NULL,"dialogText");//第二个参数为另一个对话框的标题
CDialog1* dlg = (CDialog1*)CWnd::FromHandle(hWnd);
dlg->GetDlgItem(IDC_EDIT1)->SetWindowText(strMsg);
}
调用编辑框对应变量的UpdateData