Attaches a BSTR to the CComBSTR object by setting the m_str member to src.
void Attach(
BSTR src
) throw( );
Parameters
- src
[in] The BSTR to attach to the object.
Remarks
Do not pass an ordinary wide-character string to this method. The compiler cannot catch the error and run time errors will occur.
备注
This method will assert if m_str is non-NULL.
Example
// STDMETHOD(BSTRToUpper)(/*[in, out]*/ BSTR bstrConv);
STDMETHODIMP InplaceBSTRToUpper(BSTR bstrConv)
{
// Assign bstrConv to m_str member of CComBSTR
CComBSTR bstrTemp;
bstrTemp.Attach(bstrConv);
// Make sure BSTR is not NULL string
if (!bstrTemp)
return E_POINTER;
// Make string uppercase
HRESULT hr;
hr = bstrTemp.ToUpper();
if (hr != S_OK)
return hr;
// Set m_str to NULL, so the BSTR is not freed
bstrTemp.Detach();
return S_OK;
}
Requirements
Header: atlcomcli.h