데이터 타입 - ATL

CComBSTR

.=()

.Copy()
.CopyTo()

CComBSTR m_bstrURL;    // BSTR representing a URL

// put_URL is the put method for the URL property.
STDMETHOD(put_URL)(BSTR strURL)
{
    ATLTRACE(_T("put_URL\n"));

    // free existing string in m_bstrURL & make a copy
    // of strURL pointed to by m_bstrURL
    m_bstrURL = strURL;
    return S_OK;
}

// get_URL is the get method for the URL property.
STDMETHOD(get_URL)(BSTR* pstrURL)
{
    ATLTRACE(_T("get_URL\n"));

    // make a copy of m_bstrURL pointed to by pstrURL
    *pstrURL = m_bstrURL.Copy();
    return S_OK;
}
/*
or

STDMETHOD(get_URL)(BSTR* pstrURL)
{
    // Make a copy of m_bstrURL and return it via pstrURL
    return m_bstrURL.CopyTo(pstrURL);
}

*/

CComVariant


참조 사이트:

http://msdn.microsoft.com/en-us/library/xc68523x(VS.80).aspx
http://msdn.microsoft.com/en-us/library/19hbst0w(VS.80).aspx