int CALLBACK WinMain()

in cpp/ScreenCaptureforHWND/ScreenCaptureforHWND/main.cpp [68:159]
73 lines of code
3 McCabe index (conditional complexity)

int CALLBACK WinMain(
    HINSTANCE instance,
    HINSTANCE previousInstance,
    LPSTR     cmdLine,
    int       cmdShow)
{
	// Init COM
	init_apartment(apartment_type::single_threaded);

    // Create the window
    WNDCLASSEX wcex = {};
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = instance;
    wcex.hIcon = LoadIcon(instance, MAKEINTRESOURCE(IDI_APPLICATION));
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = L"ScreenCaptureforHWND";
    wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
    WINRT_VERIFY(RegisterClassEx(&wcex));

    HWND hwnd = CreateWindow(
        L"ScreenCaptureforHWND",
        L"ScreenCaptureforHWND",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        800,
        600,
        NULL,
        NULL,
        instance,
        NULL);
    WINRT_VERIFY(hwnd);

    ShowWindow(hwnd, cmdShow);
    UpdateWindow(hwnd);

    // Create combo box
    HWND comboBoxHwnd = CreateWindow(
        WC_COMBOBOX,
        L"",
        CBS_DROPDOWNLIST | CBS_HASSTRINGS | WS_VSCROLL | WS_CHILD | WS_OVERLAPPED | WS_VISIBLE,
        10,
        10,
        200,
        200,
        hwnd,
        NULL,
        instance,
        NULL);
    WINRT_VERIFY(comboBoxHwnd);

    // Populate combo box
    for (auto& window : g_windows)
    {
        SendMessage(comboBoxHwnd, CB_ADDSTRING, 0, (LPARAM)window.Title().c_str());
    }
    //SendMessage(comboBoxHwnd, CB_SETCURSEL, 0, 0);

    // Create a DispatcherQueue for our thread
    auto controller = CreateDispatcherQueueController();

    // Initialize Composition
    auto compositor = Compositor();
    auto target = CreateDesktopWindowTarget(compositor, hwnd);
    auto root = compositor.CreateContainerVisual();
    root.RelativeSizeAdjustment({ 1.0f, 1.0f });
    target.Root(root);

    // Enqueue our capture work on the dispatcher
    auto queue = controller.DispatcherQueue();
    auto success = queue.TryEnqueue([=]() -> void
    {
        g_app->Initialize(root);
    });
    WINRT_VERIFY(success);

    // Message pump
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}