CString——————————>int
CString strNum(_T("100"));
int num;
num = _ttoi(strNum);
//num = atoi(strNum);
CString<——————————int
int i = 123;
CString str ;
str.Format(_T("%d"), i);
CString——————————>LPARAM
CString str=_T("444");
LPARAM lp=(LPARAM)str1.GetBuffer(256);
str.ReleaseBuffer();
int num1, num2, num3;
CString str1,str2,str3;
::SendMessage(GetDlgItem(IDC_EDIT2)->m_hWnd, WM_GETTEXT, 10, (LPARAM)str1.GetBuffer(256));
::SendMessage(GetDlgItem(IDC_EDIT3)->m_hWnd, WM_GETTEXT, 10, (LPARAM)str2.GetBuffer(256));
num1 = _ttoi(str1);
num2 = _ttoi(str2);
num3 = num1 + num2;
str3.Format(_T("%d"), num3);
m_edit3.SendMessage(WM_SETTEXT,0, (LPARAM)str3.GetBuffer(0));
str1.ReleaseBuffer();
str2.ReleaseBuffer();
str3.ReleaseBuffer();