namespace xdead {

#define XDEAD_CALLBACK(type, name, ...) type __stdcall name##_callback(##__VA_ARGS__)
#define XDEAD_FUNCTION_NAME(name, ordinal) static constexpr auto name = ordinal

enum class ListenerStatus {
    Ok               = 0,
    OrdinalNotFound  = 1,
    InvalidCallback  = 2,
    CallbackNotFound = 3,
};

// ...
XDEAD_FUNCTION_NAME(XFriendsCreateEnumerator, 5312);
// ...

auto __stdcall add_listener(uint32_t ordinal, void* callback, uint32_t index) -> ListenerStatus;
auto __stdcall remove_listener(uint32_t ordinal, void* callback) -> ListenerStatus;
auto __stdcall remove_all_listeners() -> ListenerStatus;

using add_listener_t = decltype(&add_listener);
using remove_listener_t = decltype(&remove_listener);
using remove_all_listeners_t = decltype(&remove_all_listeners);
}

// Define a callback
XDEAD_CALLBACK(signed int, XFriendsCreateEnumerator, int a1, int a2, int a3, int a4, int a5)
{
    // By default XDead always returns 0 which in most functions means "success".
    // If a callback returns anything else, all other callbacks of this
    // functions will not run.
    return 1;
}

// Get exported functions

auto xdead = GetModuleHandleA("xlive.dll");

auto xdead_add_listener = xdead::add_listener_t(
    GetProcAddress(xdead, "xdead_add_listener")
);

auto xdead_remove_listener = xdead::remove_listener_t(
    GetProcAddress(xdead, "xdead_remove_listener")
);

auto xdead_remove_all_listeners = xdead::remove_all_listeners_t(
    GetProcAddress(xdead, "xdead_remove_all_listeners")
);

// Add callback as listener

auto status = xdead_add_listener(
    xdead::XFriendsCreateEnumerator,   // Provide ordinal by function name
    XFriendsCreateEnumerator_callback, // Function from above
    0                                  // Sort index
);

if (status == xdead::ListenerStatus::Ok) {
    println("Added listener for XFriendsCreateEnumerator");
}

// Remove listener

xdead_remove_listener(XFriendsCreateEnumerator_callback);

// Or automatically remove all previously added listeners

// NOTE: This also remove listeners which have been added by other modules.
xdead_remove_all_listeners();