El valor en el cuadro de edición de Win API se asigna a una variable

void

CTestDlg::OnClickedButton2()

{

int

num1,num2,num3;

CString

str1,str2,str3;

::SendMessageW(GetDlgItem(IDC_EDIT1)->m_hWnd,WM_GETTEXT,10,(LPARAM)str1.GetBuffer (256));

::SendMessageW(m_edit2.m_hWnd,WM_GETTEXT,10,(LPARAM)str2.GetBuffer(256));

num1

= _wtoi(str1);

num2 = _wtoi(str2);

num3 = num1 +

num2;

str3.Formato (L"%d",num3);

m_edit3.SendMessageW(WM_SETTEXT,10,(LPARAM)str3.GetBuffer(0));

str1.ReleaseBuffer();

str2.ReleaseBuffer();

str3.ReleaseBuffer();

}