// See: http://social.microsoft.com/Forums/en/Offtopic/thread/9ebd7ad6-a460-4a28-9de9-2af63fd4a13e
HRESULT RegisterDevice(LPCWSTR devID, ERole role)
{
	IPolicyConfig *pPolicyConfig = nullptr;

	HRESULT hr = CoCreateInstance(__uuidof(CPolicyConfigClient), NULL, CLSCTX_ALL, __uuidof(IPolicyConfig), (LPVOID *)&pPolicyConfig);
	if (pPolicyConfig == nullptr) {
		hr = CoCreateInstance(__uuidof(CPolicyConfigClient), NULL, CLSCTX_ALL, __uuidof(IPolicyConfig10), (LPVOID *)&pPolicyConfig);
	}
	if (pPolicyConfig == nullptr) {
		hr = CoCreateInstance(__uuidof(CPolicyConfigClient), NULL, CLSCTX_ALL, __uuidof(IPolicyConfig7), (LPVOID *)&pPolicyConfig);
	}
	if (pPolicyConfig == nullptr) {
		hr = CoCreateInstance(__uuidof(CPolicyConfigClient), NULL, CLSCTX_ALL, __uuidof(IPolicyConfigVista), (LPVOID *)&pPolicyConfig);
	}
	if (pPolicyConfig == nullptr) {
		hr = CoCreateInstance(__uuidof(CPolicyConfigClient), NULL, CLSCTX_ALL, __uuidof(IPolicyConfig10_1), (LPVOID *)&pPolicyConfig);
	}

	if (pPolicyConfig != NULL) {
		hr = pPolicyConfig->SetDefaultEndpoint(devID, role);
		SAFE_RELEASE(pPolicyConfig);
	}

	return hr;
}
HRESULT RegisterDevice(PCWSTR devID)
{
	HRESULT hr = S_FALSE;

	InitCom();
	IPolicyConfig *pPolicyConfig;

	hr = CoCreateInstance(IID_CPolicyConfigClient, nullptr,
						CLSCTX_ALL, IID_IPolicyConfig,
						(LPVOID *)&pPolicyConfig);
	if (hr == S_OK)
	{
		hr = pPolicyConfig->SetDefaultEndpoint(devID, eConsole);
		if (hr == S_OK)
		{
			hr = pPolicyConfig->SetDefaultEndpoint(devID, eCommunications);
		}
		SAFE_RELEASE(pPolicyConfig);
	}

	UnInitCom();
	return hr;
}
Example #3
0
//-------------------------------------------------------------------------------------------------
void FMain()
{
    if (const HWND hWnd = FindWindowW(g_wGuidClass, nullptr))
        PostMessageW(hWnd, WM_CLOSE, 0, 0);

    if (SUCCEEDED(CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED)))
    {
        IMMDeviceEnumerator *immDeviceEnumerator;
        if (CoCreateInstance(__uuidof(MMDeviceEnumerator), nullptr, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), reinterpret_cast<LPVOID*>(&immDeviceEnumerator)) == S_OK)
        {
            IMMDevice *immDeviceDefault;
            if (immDeviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &immDeviceDefault) == S_OK)
            {
                wchar_t *wIdDefaultOld;
                HRESULT hr = immDeviceDefault->GetId(&wIdDefaultOld);
                immDeviceDefault->Release();
                if (hr == S_OK)
                {
                    IMMDeviceCollection *immDeviceCollection;
                    hr = immDeviceEnumerator->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, &immDeviceCollection);
                    immDeviceEnumerator->Release();
                    if (hr == S_OK)
                    {
                        UINT iCount;
                        if (immDeviceCollection->GetCount(&iCount) == S_OK)
                        {
                            bool bFail = true;
                            for (UINT i = 0; i < iCount; ++i)
                            {
                                IMMDevice *immDevice;
                                if (immDeviceCollection->Item(i, &immDevice) == S_OK)
                                {
                                    wchar_t *wIdEnum;
                                    hr = immDevice->GetId(&wIdEnum);
                                    immDevice->Release();
                                    if (hr == S_OK)
                                    {
                                        if (FCompareMemoryW(wIdDefaultOld, wIdEnum))
                                        {
                                            bFail = false;
                                            if (++i >= iCount)
                                                i = 0;
                                            hr = immDeviceCollection->Item(i, &immDevice);
                                            immDeviceCollection->Release();
                                            if (hr == S_OK)
                                            {
                                                wchar_t *wIdDefaultNew;
                                                if (immDevice->GetId(&wIdDefaultNew) == S_OK)
                                                {
                                                    IPropertyStore *ipStore;
                                                    hr = immDevice->OpenPropertyStore(STGM_READ, &ipStore);
                                                    immDevice->Release();
                                                    if (hr == S_OK)
                                                    {
                                                        PROPVARIANT propFriendlyName;
                                                        PropVariantInitFix(&propFriendlyName);
                                                        PROPERTYKEY propKeyFriendlyName;
                                                        propKeyFriendlyName.fmtid.Data1 = 0xA45C254E;
                                                        propKeyFriendlyName.fmtid.Data2 = 0xDF1C;
                                                        propKeyFriendlyName.fmtid.Data3 = 0x4EFD;
                                                        FCopyMemory(propKeyFriendlyName.fmtid.Data4);
                                                        propKeyFriendlyName.pid = 14;
                                                        hr = ipStore->GetValue(propKeyFriendlyName, &propFriendlyName);
                                                        ipStore->Release();
                                                        if (SUCCEEDED(hr))
                                                        {
                                                            IPolicyConfig *pPolicyConfig;
                                                            if (CoCreateInstance(__uuidof(CPolicyConfigClient), nullptr, CLSCTX_ALL, (GetVersion() & 0xFF) >= 10 ? __uuidof(IPolicyConfigWin10) : __uuidof(IPolicyConfig), reinterpret_cast<LPVOID*>(&pPolicyConfig)) == S_OK)
                                                            {
                                                                hr = pPolicyConfig->SetDefaultEndpoint(wIdDefaultNew, eConsole);
                                                                if (hr == S_OK)
                                                                {
                                                                    pPolicyConfig->SetDefaultEndpoint(wIdDefaultNew, eMultimedia);
                                                                    pPolicyConfig->SetDefaultEndpoint(wIdDefaultNew, eCommunications);
                                                                }
                                                                pPolicyConfig->Release();
                                                                if (hr == S_OK)
                                                                {
                                                                    WNDCLASSEX wndCl;
                                                                    wndCl.cbSize = sizeof(WNDCLASSEX);
                                                                    wndCl.style = 0;
                                                                    wndCl.lpfnWndProc = WindowProc;
                                                                    wndCl.cbClsExtra = 0;
                                                                    wndCl.cbWndExtra = 0;
                                                                    wndCl.hInstance = GetModuleHandleW(nullptr);
                                                                    wndCl.hIcon = nullptr;
                                                                    wndCl.hCursor = nullptr;
                                                                    wndCl.hbrBackground = nullptr;
                                                                    wndCl.lpszMenuName = nullptr;
                                                                    wndCl.lpszClassName = g_wGuidClass;
                                                                    wndCl.hIconSm = nullptr;

                                                                    if (RegisterClassExW(&wndCl))
                                                                    {
                                                                        if (CreateWindowExW(WS_EX_NOACTIVATE | WS_EX_LAYERED | WS_EX_TOOLWINDOW | WS_EX_TRANSPARENT | WS_EX_TOPMOST, g_wGuidClass, nullptr, WS_POPUP | WS_VISIBLE | WS_MAXIMIZE, 0, 0, 0, 0, nullptr, nullptr, wndCl.hInstance, propFriendlyName.pwszVal))
                                                                        {
                                                                            MSG msg;
                                                                            while (GetMessageW(&msg, nullptr, 0, 0) > 0)
                                                                                DispatchMessageW(&msg);
                                                                        }
                                                                        UnregisterClassW(g_wGuidClass, wndCl.hInstance);
                                                                    }
                                                                }
                                                            }
                                                        }
                                                        PropVariantClear(&propFriendlyName);
                                                    }
                                                    CoTaskMemFree(wIdDefaultNew);
                                                }
                                                else
                                                    immDevice->Release();
                                            }
                                            break;
                                        }
                                        CoTaskMemFree(wIdEnum);
                                    }
                                }
                            }
                            if (bFail)
                                immDeviceCollection->Release();
                        }
                        else
                            immDeviceCollection->Release();
                    }
                    CoTaskMemFree(wIdDefaultOld);
                }
                else
                    immDeviceEnumerator->Release();
            }
            else
                immDeviceEnumerator->Release();
        }
        CoUninitialize();
    }
}