Reloaded-II-Game-Transition.cs

private unsafe void HookCreateProcess()
{
    var kernel32 = PInvoke.GetModuleHandle("kernel32.dll");
    if (kernel32 is null)
    {
        _logger.WriteLine($"[{_modConfig.ModId}] Could not load kernel32 module - exception handler won't be removed", _logger.ColorRed);
        return;
    }

    var createProcessA = PInvoke.GetProcAddress(kernel32, "CreateProcessA");
    if (createProcessA.IsNull)
    {
        _logger.WriteLine($"[{_modConfig.ModId}] SetUnhandledExceptionFilter not found in kernel32 module - exception handler won't be removed", _logger.ColorRed);
        return;
    }

    if (_hooks is null)
    {
        _logger.WriteLine($"[{_modConfig.ModId}] IReloadedHooks is null? Reloaded.SharedLib.Hooks was not loaded?", _logger.ColorRed);
        return;
    }

    CreateProcessHook = _hooks.CreateHook<CreateProcessADelegate>(CreateProcessImpl, createProcessA).Activate();
}
    
private unsafe nint CreateProcessImpl(char* lpApplicationName, char* lpCommandLine, SECURITY_ATTRIBUTES* lpProcessAttributes, SECURITY_ATTRIBUTES* lpThreadAttributes, 
    nint bInheritHandles, PROCESS_CREATION_FLAGS dwCreationFlags, 
    void* lpEnvironment, string lpCurrentDirectory, STARTUPINFOW* lpStartupInfo, PROCESS_INFORMATION* lpProcessInformation)
{
    string commandLine = Marshal.PtrToStringAnsi((nint)lpCommandLine);

    int exeExtIndex = commandLine.IndexOf(".exe") + 4;
    string exeToLaunch = commandLine.Substring(0, exeExtIndex);
    string argumentsOnly = commandLine.Substring(exeExtIndex, commandLine.Length - exeExtIndex);

    var config = IConfig<LoaderConfig>.FromPathOrDefault(Paths.LoaderConfigPath);
    if (config is null)
    {
        _logger.WriteLine($"[{_modConfig.ModId}] Failed to locate Reloaded-II, unable to handle game mode transition!", _logger.ColorRed);
        return 0;
    }

    
    exeToLaunch = exeToLaunch.Replace("//", "/");

    var configurations = ApplicationConfig.GetAllApplications(config.GetApplicationConfigDirectory());
    foreach (var configuration in configurations)
    {
        var application = configuration.Config;
        var appLocation = ApplicationConfig.GetAbsoluteAppLocation(configuration);

        if (Path.GetFileName(appLocation).Equals(Path.GetFileName(exeToLaunch), StringComparison.OrdinalIgnoreCase))
        {
            Process? process = Process.Start(new ProcessStartInfo()
            {
                FileName = config.LauncherPath,
                Arguments = $"--launch \"{appLocation}\" --arguments \"{argumentsOnly}\" --working-directory \"{Path.GetDirectoryName(appLocation)}\"",
                UseShellExecute = false,
                WorkingDirectory = Path.GetDirectoryName(config.LauncherPath),
            });
            process.OutputDataReceived += (s, e) => _logger.WriteLine($"[{_modConfig.ModId}] [Launcher] {e.Data}");
            return 1;
        }
    }

    return 0;
}