_AFXWIN_INLINE CSize CDC::

GetOutputTextExtent(LPCTSTR lpszString, int nCount) const
    {
        ASSERT(m_hDC != NULL);
        SIZE size;
        VERIFY(::GetTextExtentPoint32(m_hDC, lpszString, nCount, &size));
        return size;
    }

_AFXWIN_INLINE CSize CDC::GetOutputTextExtent(const CString& str) const
    {
        ASSERT(m_hDC != NULL);
        SIZE size;
        VERIFY(::GetTextExtentPoint32(m_hDC, str, (int)str.GetLength(), &size));
        return size;
    }