C / C++ / MFC

extern "C" __declspec(dllexport) VARIANT __cdecl getDevice()
{
	// Create the System Device Enumerator.
    hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
    CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, 
    reinterpret_cast<void**>(&pDevEnum));

	if (SUCCEEDED(hr))
	{
		// Create an enumerator for the video capture category.
		hr = pDevEnum->CreateClassEnumerator(
			CLSID_VideoInputDeviceCategory,
			&pEnum, 0);
	}

	while (pEnum->Next(1, &pMoniker, NULL) == S_OK)
	{
		IPropertyBag *pPropBag;
		hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, 
			(void**)(&pPropBag));
		if (FAILED(hr))
		{
			pMoniker->Release();
			continue;  // Skip this one, maybe the next one will work.
		} 
		// Find the description or friendly name.
		extern VARIANT varName;
		VariantInit(&varName);
		hr = pPropBag->Read(L"FriendlyName", &varName, 0);

		pPropBag->Release();
		pMoniker->Release();
	}
	return varName;
}