HRESULT HrGetComponentEnum (INetCfg* pnc,
IN const GUID* pguidClass,
OUT IEnumNetCfgComponent **ppencc)
{
INetCfgClass *pncclass;
HRESULT hr;
*ppencc = NULL;
//
// Get the class reference.
//
hr = pnc->QueryNetCfgClass( pguidClass,
IID_INetCfgClass,
(PVOID *)&pncclass );
if ( hr == S_OK ) {
//
// Get the enumerator reference.
//
hr = pncclass->EnumComponents( ppencc );
//
// We don't need the class reference any more.
//
ReleaseRef( pncclass );
}
return hr;
}
//+---------------------------------------------------------------------------
//
// Function: HrShowNetComponents
//
// Purpose: Display the list of installed components of the
// specified class.
//
// Arguments:
// pnc [in] pointer to INetCfg object
// pguidClass [in] pointer to class GUID
//
// Returns: S_OK on success, otherwise an error code
//
// Notes:
//
HRESULT HrShowNetComponents(IN INetCfg* pnc,
IN const GUID* pguidClass)
{
HRESULT hr=S_OK;
PWSTR szInfId;
PWSTR szDisplayName;
DWORD dwcc;
INetCfgComponent* pncc;
INetCfgClass* pncclass;
IEnumNetCfgComponent* pencc;
ULONG celtFetched;
hr = pnc->QueryNetCfgClass(pguidClass, IID_INetCfgClass,
(void**)&pncclass);
if (SUCCEEDED(hr))
{
// get IEnumNetCfgComponent so that we can enumerate
hr = pncclass->EnumComponents(&pencc);
ReleaseObj(pncclass);
while (SUCCEEDED(hr) &&
(S_OK == (hr = pencc->Next(1, &pncc, &celtFetched))))
{
if (pguidClass == &GUID_DEVCLASS_NET)
{
// we are interested only in physical netcards
//
hr = pncc->GetCharacteristics(&dwcc);
if (FAILED(hr) || !(dwcc & NCF_PHYSICAL))
{
hr = S_OK;
ReleaseObj(pncc);
continue;
}
}
hr = pncc->GetId(&szInfId);
if (S_OK == hr)
{
hr = pncc->GetDisplayName(&szDisplayName);
if (SUCCEEDED(hr))
{
LogPrintf(_T("%-26s %s\n"), szInfId, szDisplayName);
CoTaskMemFree(szDisplayName);
}
CoTaskMemFree(szInfId);
}
// we dont want to stop enumeration just because 1 component
// failed either GetId or GetDisplayName, therefore reset hr to S_OK
hr = S_OK;
ReleaseObj(pncc);
}
ReleaseObj(pencc);
}
if (S_FALSE == hr)
{
hr = S_OK;
}
return hr;
}
