C / C++ / MFC

string Get_FName(GUID DEVICECLSID)
{
	HRESULT hr;	// COM result
	ICreateDevEnum *pDeviceEnum = NULL;// Create the System Device Enumerator.
	IEnumMoniker *pEnumCat = NULL;// Device enumeration moniker
	wstring inname;
	
	hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED );// Initialise COM
	hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,IID_ICreateDevEnum, (void **)&pDeviceEnum);
	
	if (FAILED(hr))
	{

		//break;
	}

// Obtain a class enumerator for the audio input category.
	hr = pDeviceEnum->CreateClassEnumerator(DEVICECLSID, &pEnumCat, 0);

if (hr == S_OK) 
{
    // Enumerate the monikers.
    IMoniker *pDeviceMonik = NULL;
    ULONG cFetched;
	while(pEnumCat->Next(1, &pDeviceMonik, &cFetched) == S_OK)

    {
		

        IPropertyBag *pPropBag;
        hr = pDeviceMonik->BindToStorage(0, 0, IID_IPropertyBag,(void **)&pPropBag);
        if (SUCCEEDED(hr))
        {
            VARIANT varName;
            VariantInit(&varName);
			hr = pPropBag->Read(L"FriendlyName", &varName, 0);
      		if (SUCCEEDED(hr))
            {	
				inname = varName.bstrVal;
				hr = pDeviceMonik->IsRunning(0,0,0);// nt sure bout this part
				if ( hr == S_OK){ goto skip;}
			}
    		
            
			VariantClear(&varName);
			pPropBag->Release();
        }
        pDeviceMonik->Release();
    }
    pEnumCat->Release();
}
skip:
pDeviceEnum->Release();
string s(inname.begin(), inname.end());
s.assign(inname.begin(), inname.end());


								
return s;
}