LInjector Luau Script IDE

Skill by ara.so — Daily 2026 Skills collection.

LInjector is an open-source Luau/Lua script IDE and executor built as a Windows Forms application in C# (.NET Framework 4.8, 32-bit). It features the Monaco editor (the same editor powering VS Code) with Luau syntax highlighting, an optimized multi-tab system, and DLL injection capabilities targeting the Roblox UWP client.

Important Note (2026): The UWP Version is patched due to Hyperion/Byfron anti-cheat. You can still build, modify, and extend LInjector by providing your own working DLL or injection method.

Project Structure

LInjector/
├── LInjector.sln              # Visual Studio solution
├── LInjector/
│   ├── LInjector.csproj       # Project file (.NET 4.8, x86)
│   ├── Forms/                 # Windows Forms UI
│   │   ├── MainForm.cs        # Main application window
│   │   └── *.cs               # Other form files
│   ├── Classes/               # Core logic classes
│   │   ├── Injector.cs        # DLL injection logic
│   │   ├── TabSystem.cs       # Optimized tab management
│   │   └── *.cs
│   ├── Monaco/                # Monaco editor web assets
│   │   ├── index.html         # Editor host page
│   │   └── *.js               # Monaco JS files
│   └── Resources/             # Embedded resources

Build Requirements

Visual Studio 2022
.NET Framework 4.8 SDK
Target Platform: x86 (32-bit)
Configuration: Release

How to Build

# 1. Clone the repository
git clone https://github.com/WeritoP/LInjector-FORKED-
cd LInjector-FORKED-

# 2. Open in Visual Studio 2022
start LInjector.sln

# 3. Set build configuration in VS:
#    Configuration: Release
#    Platform: x86

# 4. Build via keyboard shortcut
# CTRL + SHIFT + B

# OR via CLI with MSBuild
msbuild LInjector.sln /p:Configuration=Release /p:Platform=x86

Important: Always compile before editing Forms. If you open a Form before compiling, Visual Studio's designer will fail. If this happens, restart Visual Studio.

Monaco Editor Integration

LInjector embeds Monaco in a WebBrowser or WebView2 control. The editor is hosted in a local HTML file.

Accessing the Monaco Editor from C#

// In your Form class — get script content from Monaco
private string GetEditorContent()
{
    // Execute JavaScript to retrieve editor value
    object result = webBrowser.Document.InvokeScript(
        "eval",
        new object[] { "monaco.editor.getModels()[0].getValue()" }
    );
    return result?.ToString() ?? string.Empty;
}

// Set content in Monaco editor
private void SetEditorContent(string script)
{
    string escaped = script
        .Replace("\\", "\\\\")
        .Replace("'", "\\'")
        .Replace("\n", "\\n")
        .Replace("\r", "\\r");

    webBrowser.Document.InvokeScript(
        "eval",
        new object[] { $"monaco.editor.getModels()[0].setValue('{escaped}')" }
    );
}

Monaco Editor Host HTML (Monaco/index.html pattern)

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <style>
        html, body, #container {
            width: 100%; height: 100%;
            margin: 0; padding: 0;
            overflow: hidden;
            background: #1e1e1e;
        }
    </style>
</head>
<body>
    <div id="container"></div>
    <script src="monaco/min/vs/loader.js"></script>
    <script>
        require.config({ paths: { 'vs': 'monaco/min/vs' } });
        require(['vs/editor/editor.main'], function () {
            window.editor = monaco.editor.create(
                document.getElementById('container'), {
                    value: '-- LInjector Script\n',
                    language: 'lua',
                    theme: 'vs-dark',
                    fontSize: 14,
                    automaticLayout: true,
                    minimap: { enabled: false },
                    scrollBeyondLastLine: false
                }
            );
        });

        // Helper functions callable from C#
        function getScript() {
            return window.editor.getValue();
        }
        function setScript(val) {
            window.editor.setValue(val);
        }
        function clearScript() {
            window.editor.setValue('');
        }
    </script>
</body>
</html>

Tab System

LInjector's tab system is optimized to cap RAM usage at ~1 GB even with 40+ tabs open.

// TabSystem.cs — Example pattern for managing script tabs
public class ScriptTab
{
    public string Name { get; set; }
    public string Content { get; set; }
    public TabPage TabPage { get; set; }

    public ScriptTab(string name, string content = "")
    {
        Name = name;
        Content = content;
    }
}

public class TabManager
{
    private readonly List<ScriptTab> _tabs = new List<ScriptTab>();
    private readonly TabControl _tabControl;
    private int _activeIndex = 0;

    public TabManager(TabControl tabControl)
    {
        _tabControl = tabControl;
    }

    // Add a new script tab
    public void AddTab(string name = null)
    {
        int tabNumber = _tabs.Count + 1;
        string tabName = name ?? $"Script {tabNumber}";

        var tab = new ScriptTab(tabName);
        var tabPage = new TabPage(tabName);

        tab.TabPage = tabPage;
        _tabs.Add(tab);
        _tabControl.TabPages.Add(tabPage);
        _tabControl.SelectedTab = tabPage;
    }

    // Remove tab by index
    public void RemoveTab(int index)
    {
        if (index < 0 || index >= _tabs.Count) return;
        _tabControl.TabPages.Remove(_tabs[index].TabPage);
        _tabs.RemoveAt(index);
    }

    // Save current tab content before switching
    public void SaveCurrentTabContent(string content)
    {
        if (_activeIndex >= 0 && _activeIndex < _tabs.Count)
            _tabs[_activeIndex].Content = content;
    }

    // Get content for a tab
    public string GetTabContent(int index)
    {
        if (index < 0 || index >= _tabs.Count) return string.Empty;
        return _tabs[index].Content;
    }
}

DLL Injection (Custom Integration)

Since the original injection target is patched, here is the pattern used to plug in your own DLL:

// Classes/Injector.cs — Pattern for DLL injection
using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;

public class Injector
{
    [DllImport("kernel32.dll")]
    private static extern IntPtr OpenProcess(int access, bool inherit, int processId);

    [DllImport("kernel32.dll")]
    private static extern IntPtr VirtualAllocEx(
        IntPtr hProcess, IntPtr lpAddress,
        uint dwSize, uint flAllocationType, uint flProtect);

    [DllImport("kernel32.dll")]
    private static extern bool WriteProcessMemory(
        IntPtr hProcess, IntPtr lpBaseAddress,
        byte[] lpBuffer, uint nSize, out UIntPtr lpNumberOfBytesWritten);

    [DllImport("kernel32.dll")]
    private static extern IntPtr CreateRemoteThread(
        IntPtr hProcess, IntPtr lpThreadAttributes, uint dwStackSize,
        IntPtr lpStartAddress, IntPtr lpParameter,
        uint dwCreationFlags, IntPtr lpThreadId);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
    private static extern IntPtr GetModuleHandle(string lpModuleName);

    [DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
    private static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

    private const int PROCESS_ALL_ACCESS = 0x1F0FFF;
    private const uint MEM_COMMIT = 0x1000;
    private const uint MEM_RESERVE = 0x2000;
    private const uint PAGE_READWRITE = 0x04;

    /// <summary>
    /// Inject a DLL into a target process by name.
    /// Returns true on success.
    /// </summary>
    public static bool InjectDll(string processName, string dllPath)
    {
        if (!File.Exists(dllPath))
            throw new FileNotFoundException($"DLL not found: {dllPath}");

        Process[] procs = Process.GetProcessesByName(processName);
        if (procs.Length == 0)
            throw new Exception($"Process '{processName}' not found.");

        Process target = procs[0];
        IntPtr hProcess = OpenProcess(PROCESS_ALL_ACCESS, false, target.Id);
        if (hProcess == IntPtr.Zero)
            throw new Exception("Failed to open process.");

        byte[] dllBytes = System.Text.Encoding.ASCII.GetBytes(dllPath + "\0");
        IntPtr allocMem = VirtualAllocEx(
            hProcess, IntPtr.Zero, (uint)dllBytes.Length,
            MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

        if (allocMem == IntPtr.Zero)
            throw new Exception("Memory allocation failed.");

        WriteProcessMemory(hProcess, allocMem, dllBytes,
            (uint)dllBytes.Length, out _);

        IntPtr loadLibAddr = GetProcAddress(
            GetModuleHandle("kernel32.dll"), "LoadLibraryA");

        IntPtr thread = CreateRemoteThread(
            hProcess, IntPtr.Zero, 0,
            loadLibAddr, allocMem, 0, IntPtr.Zero);

        return thread != IntPtr.Zero;
    }
}

Using the Injector from UI

// In MainForm.cs — Inject button click handler
private async void btnInject_Click(object sender, EventArgs e)
{
    string dllPath = Path.Combine(
        Application.StartupPath, "Modules", "your_dll.dll");

    try
    {
        bool success = await Task.Run(() =>
            Injector.InjectDll("RobloxPlayerBeta", dllPath));

        lblStatus.Text = success
            ? "✔ Injected successfully"
            : "✘ Injection failed";
    }
    catch (Exception ex)
    {
        MessageBox.Show($"Error: {ex.Message}", "LInjector",
            MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}

Script Execution Pattern

// Execute the current script via the injected DLL's named pipe or HTTP endpoint
private async void btnExecute_Click(object sender, EventArgs e)
{
    string script = GetEditorContent();
    if (string.IsNullOrWhiteSpace(script)) return;

    try
    {
        await ExecuteScriptAsync(script);
        lblStatus.Text = "Script executed.";
    }
    catch (Exception ex)
    {
        lblStatus.Text = $"Error: {ex.Message}";
    }
}

private async Task ExecuteScriptAsync(string script)
{
    // Example: communicate with injected DLL via named pipe
    using var pipe = new System.IO.Pipes.NamedPipeClientStream(
        ".", "LInjectorPipe",
        System.IO.Pipes.PipeDirection.Out);

    await pipe.ConnectAsync(timeoutMilliseconds: 3000);

    byte[] data = System.Text.Encoding.UTF8.GetBytes(script);
    await pipe.WriteAsync(data, 0, data.Length);
}

Script File Management

// Save script to file
private void SaveScript(string content, string filePath = null)
{
    if (filePath == null)
    {
        using var sfd = new SaveFileDialog
        {
            Filter = "Lua Files (*.lua)|*.lua|Text Files (*.txt)|*.txt|All Files (*.*)|*.*",
            DefaultExt = "lua",
            FileName = "script"
        };
        if (sfd.ShowDialog() != DialogResult.OK) return;
        filePath = sfd.FileName;
    }
    File.WriteAllText(filePath, content, System.Text.Encoding.UTF8);
}

// Load script from file
private string LoadScript()
{
    using var ofd = new OpenFileDialog
    {
        Filter = "Lua Files (*.lua)|*.lua|Text Files (*.txt)|*.txt|All Files (*.*)|*.*"
    };
    if (ofd.ShowDialog() != DialogResult.OK) return null;
    return File.ReadAllText(ofd.FileName, System.Text.Encoding.UTF8);
}

Configuration Pattern

LInjector uses app settings for persistent configuration:

// Reading/writing settings (App.config / user settings)
// In Settings.settings, add keys: Theme, FontSize, AutoInject

// Read
string theme = Properties.Settings.Default.Theme ?? "vs-dark";
int fontSize = Properties.Settings.Default.FontSize > 0
    ? Properties.Settings.Default.FontSize : 14;

// Write and save
Properties.Settings.Default.Theme = "vs-dark";
Properties.Settings.Default.FontSize = 16;
Properties.Settings.Default.Save();

// Apply theme to Monaco from C#
private void ApplyEditorTheme(string theme)
{
    webBrowser.Document.InvokeScript(
        "eval",
        new object[] { $"monaco.editor.setTheme('{theme}')" }
    );
}

Common Customization Patterns

Change Target Process

// Replace "RobloxPlayerBeta" with your target process name
private const string TARGET_PROCESS = "RobloxPlayerBeta";
// or for UWP:
// private const string TARGET_PROCESS = "Windows10Universal";

Add Custom Luau Autocomplete to Monaco

// In Monaco/index.html — register Luau-specific completions
monaco.languages.registerCompletionItemProvider('lua', {
    provideCompletionItems: function(model, position) {
        return {
            suggestions: [
                {
                    label: 'game',
                    kind: monaco.languages.CompletionItemKind.Variable,
                    insertText: 'game',
                    documentation: 'The root DataModel instance'
                },
                {
                    label: 'workspace',
                    kind: monaco.languages.CompletionItemKind.Variable,
                    insertText: 'workspace',
                    documentation: 'Alias for game.Workspace'
                },
                {
                    label: 'loadstring',
                    kind: monaco.languages.CompletionItemKind.Function,
                    insertText: 'loadstring(${1:source})()',
                    insertTextRules:
                        monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
                    documentation: 'Load and execute a string as Lua code'
                }
            ]
        };
    }
});

Troubleshooting

| Problem | Cause | Fix | |---|---|---| | Forms designer blank/broken | Compiled before opening form | Compile first (CTRL+SHIFT+B), then restart VS | | msbuild not found | MSBuild not in PATH | Use VS Developer Command Prompt | | Injection returns false | Process not found or access denied | Run as Administrator; verify process name | | Monaco editor blank | WebBrowser control needs IE11 emulation | Add registry key for IE emulation (see below) | | DLL not found error | DLL missing from Modules/ folder | Place your DLL in the output Modules/ directory |

Fix Monaco Blank in WebBrowser Control

Add this to your app startup (requires running as admin once, or via installer):

// Force IE11 rendering mode for WebBrowser control
private static void SetWebBrowserEmulation()
{
    string appName = Path.GetFileName(Application.ExecutablePath);
    using var key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(
        @"SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION",
        writable: true);
    key?.SetValue(appName, 11001, Microsoft.Win32.RegistryValueKind.DWord);
}
// Call SetWebBrowserEmulation() in Program.cs before Application.Run()

Verify Target Process is Running

public static bool IsProcessRunning(string name)
    => Process.GetProcessesByName(name).Length > 0;

// Usage
if (!IsProcessRunning("RobloxPlayerBeta"))
{
    MessageBox.Show("Please launch Roblox before injecting.",
        "LInjector", MessageBoxButtons.OK, MessageBoxIcon.Warning);
    return;
}

Key Facts

Language: C# / .NET Framework 4.8
Platform: Windows, x86 (32-bit) only
Editor: Monaco (VS Code engine) with Lua/Luau syntax
Injection speed: ~300ms (when working)
Tab RAM cap: ~1 GB for 40+ tabs
License: MIT
Status (2026): UWP target patched by Hyperion; source remains functional for custom DLL targets

LInjector Luau Script IDE

Skill by ara.so — Daily 2026 Skills collection.

Important Note (2026): The UWP Version is patched due to Hyperion/Byfron anti-cheat. You can still build, modify, and extend LInjector by providing your own working DLL or injection method.

Project Structure

LInjector/
├── LInjector.sln              # Visual Studio solution
├── LInjector/
│   ├── LInjector.csproj       # Project file (.NET 4.8, x86)
│   ├── Forms/                 # Windows Forms UI
│   │   ├── MainForm.cs        # Main application window
│   │   └── *.cs               # Other form files
│   ├── Classes/               # Core logic classes
│   │   ├── Injector.cs        # DLL injection logic
│   │   ├── TabSystem.cs       # Optimized tab management
│   │   └── *.cs
│   ├── Monaco/                # Monaco editor web assets
│   │   ├── index.html         # Editor host page
│   │   └── *.js               # Monaco JS files
│   └── Resources/             # Embedded resources

Build Requirements

Visual Studio 2022
.NET Framework 4.8 SDK
Target Platform: x86 (32-bit)
Configuration: Release

How to Build

# 1. Clone the repository
git clone https://github.com/WeritoP/LInjector-FORKED-
cd LInjector-FORKED-

# 2. Open in Visual Studio 2022
start LInjector.sln

# 3. Set build configuration in VS:
#    Configuration: Release
#    Platform: x86

# 4. Build via keyboard shortcut
# CTRL + SHIFT + B

# OR via CLI with MSBuild
msbuild LInjector.sln /p:Configuration=Release /p:Platform=x86

Important: Always compile before editing Forms. If you open a Form before compiling, Visual Studio's designer will fail. If this happens, restart Visual Studio.

Monaco Editor Integration

LInjector embeds Monaco in a WebBrowser or WebView2 control. The editor is hosted in a local HTML file.

Accessing the Monaco Editor from C#

// In your Form class — get script content from Monaco
private string GetEditorContent()
{
    // Execute JavaScript to retrieve editor value
    object result = webBrowser.Document.InvokeScript(
        "eval",
        new object[] { "monaco.editor.getModels()[0].getValue()" }
    );
    return result?.ToString() ?? string.Empty;
}

// Set content in Monaco editor
private void SetEditorContent(string script)
{
    string escaped = script
        .Replace("\\", "\\\\")
        .Replace("'", "\\'")
        .Replace("\n", "\\n")
        .Replace("\r", "\\r");

    webBrowser.Document.InvokeScript(
        "eval",
        new object[] { $"monaco.editor.getModels()[0].setValue('{escaped}')" }
    );
}

Monaco Editor Host HTML (Monaco/index.html pattern)

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <style>
        html, body, #container {
            width: 100%; height: 100%;
            margin: 0; padding: 0;
            overflow: hidden;
            background: #1e1e1e;
        }
    </style>
</head>
<body>
    <div id="container"></div>
    <script src="monaco/min/vs/loader.js"></script>
    <script>
        require.config({ paths: { 'vs': 'monaco/min/vs' } });
        require(['vs/editor/editor.main'], function () {
            window.editor = monaco.editor.create(
                document.getElementById('container'), {
                    value: '-- LInjector Script\n',
                    language: 'lua',
                    theme: 'vs-dark',
                    fontSize: 14,
                    automaticLayout: true,
                    minimap: { enabled: false },
                    scrollBeyondLastLine: false
                }
            );
        });

        // Helper functions callable from C#
        function getScript() {
            return window.editor.getValue();
        }
        function setScript(val) {
            window.editor.setValue(val);
        }
        function clearScript() {
            window.editor.setValue('');
        }
    </script>
</body>
</html>

Tab System

LInjector's tab system is optimized to cap RAM usage at ~1 GB even with 40+ tabs open.

// TabSystem.cs — Example pattern for managing script tabs
public class ScriptTab
{
    public string Name { get; set; }
    public string Content { get; set; }
    public TabPage TabPage { get; set; }

    public ScriptTab(string name, string content = "")
    {
        Name = name;
        Content = content;
    }
}

public class TabManager
{
    private readonly List<ScriptTab> _tabs = new List<ScriptTab>();
    private readonly TabControl _tabControl;
    private int _activeIndex = 0;

    public TabManager(TabControl tabControl)
    {
        _tabControl = tabControl;
    }

    // Add a new script tab
    public void AddTab(string name = null)
    {
        int tabNumber = _tabs.Count + 1;
        string tabName = name ?? $"Script {tabNumber}";

        var tab = new ScriptTab(tabName);
        var tabPage = new TabPage(tabName);

        tab.TabPage = tabPage;
        _tabs.Add(tab);
        _tabControl.TabPages.Add(tabPage);
        _tabControl.SelectedTab = tabPage;
    }

    // Remove tab by index
    public void RemoveTab(int index)
    {
        if (index < 0 || index >= _tabs.Count) return;
        _tabControl.TabPages.Remove(_tabs[index].TabPage);
        _tabs.RemoveAt(index);
    }

    // Save current tab content before switching
    public void SaveCurrentTabContent(string content)
    {
        if (_activeIndex >= 0 && _activeIndex < _tabs.Count)
            _tabs[_activeIndex].Content = content;
    }

    // Get content for a tab
    public string GetTabContent(int index)
    {
        if (index < 0 || index >= _tabs.Count) return string.Empty;
        return _tabs[index].Content;
    }
}

DLL Injection (Custom Integration)

Since the original injection target is patched, here is the pattern used to plug in your own DLL:

// Classes/Injector.cs — Pattern for DLL injection
using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;

public class Injector
{
    [DllImport("kernel32.dll")]
    private static extern IntPtr OpenProcess(int access, bool inherit, int processId);

    [DllImport("kernel32.dll")]
    private static extern IntPtr VirtualAllocEx(
        IntPtr hProcess, IntPtr lpAddress,
        uint dwSize, uint flAllocationType, uint flProtect);

    [DllImport("kernel32.dll")]
    private static extern bool WriteProcessMemory(
        IntPtr hProcess, IntPtr lpBaseAddress,
        byte[] lpBuffer, uint nSize, out UIntPtr lpNumberOfBytesWritten);

    [DllImport("kernel32.dll")]
    private static extern IntPtr CreateRemoteThread(
        IntPtr hProcess, IntPtr lpThreadAttributes, uint dwStackSize,
        IntPtr lpStartAddress, IntPtr lpParameter,
        uint dwCreationFlags, IntPtr lpThreadId);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
    private static extern IntPtr GetModuleHandle(string lpModuleName);

    [DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
    private static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

    private const int PROCESS_ALL_ACCESS = 0x1F0FFF;
    private const uint MEM_COMMIT = 0x1000;
    private const uint MEM_RESERVE = 0x2000;
    private const uint PAGE_READWRITE = 0x04;

    /// <summary>
    /// Inject a DLL into a target process by name.
    /// Returns true on success.
    /// </summary>
    public static bool InjectDll(string processName, string dllPath)
    {
        if (!File.Exists(dllPath))
            throw new FileNotFoundException($"DLL not found: {dllPath}");

        Process[] procs = Process.GetProcessesByName(processName);
        if (procs.Length == 0)
            throw new Exception($"Process '{processName}' not found.");

        Process target = procs[0];
        IntPtr hProcess = OpenProcess(PROCESS_ALL_ACCESS, false, target.Id);
        if (hProcess == IntPtr.Zero)
            throw new Exception("Failed to open process.");

        byte[] dllBytes = System.Text.Encoding.ASCII.GetBytes(dllPath + "\0");
        IntPtr allocMem = VirtualAllocEx(
            hProcess, IntPtr.Zero, (uint)dllBytes.Length,
            MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

        if (allocMem == IntPtr.Zero)
            throw new Exception("Memory allocation failed.");

        WriteProcessMemory(hProcess, allocMem, dllBytes,
            (uint)dllBytes.Length, out _);

        IntPtr loadLibAddr = GetProcAddress(
            GetModuleHandle("kernel32.dll"), "LoadLibraryA");

        IntPtr thread = CreateRemoteThread(
            hProcess, IntPtr.Zero, 0,
            loadLibAddr, allocMem, 0, IntPtr.Zero);

        return thread != IntPtr.Zero;
    }
}

Using the Injector from UI

// In MainForm.cs — Inject button click handler
private async void btnInject_Click(object sender, EventArgs e)
{
    string dllPath = Path.Combine(
        Application.StartupPath, "Modules", "your_dll.dll");

    try
    {
        bool success = await Task.Run(() =>
            Injector.InjectDll("RobloxPlayerBeta", dllPath));

        lblStatus.Text = success
            ? "✔ Injected successfully"
            : "✘ Injection failed";
    }
    catch (Exception ex)
    {
        MessageBox.Show($"Error: {ex.Message}", "LInjector",
            MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}

Script Execution Pattern

// Execute the current script via the injected DLL's named pipe or HTTP endpoint
private async void btnExecute_Click(object sender, EventArgs e)
{
    string script = GetEditorContent();
    if (string.IsNullOrWhiteSpace(script)) return;

    try
    {
        await ExecuteScriptAsync(script);
        lblStatus.Text = "Script executed.";
    }
    catch (Exception ex)
    {
        lblStatus.Text = $"Error: {ex.Message}";
    }
}

private async Task ExecuteScriptAsync(string script)
{
    // Example: communicate with injected DLL via named pipe
    using var pipe = new System.IO.Pipes.NamedPipeClientStream(
        ".", "LInjectorPipe",
        System.IO.Pipes.PipeDirection.Out);

    await pipe.ConnectAsync(timeoutMilliseconds: 3000);

    byte[] data = System.Text.Encoding.UTF8.GetBytes(script);
    await pipe.WriteAsync(data, 0, data.Length);
}

Script File Management

// Save script to file
private void SaveScript(string content, string filePath = null)
{
    if (filePath == null)
    {
        using var sfd = new SaveFileDialog
        {
            Filter = "Lua Files (*.lua)|*.lua|Text Files (*.txt)|*.txt|All Files (*.*)|*.*",
            DefaultExt = "lua",
            FileName = "script"
        };
        if (sfd.ShowDialog() != DialogResult.OK) return;
        filePath = sfd.FileName;
    }
    File.WriteAllText(filePath, content, System.Text.Encoding.UTF8);
}

// Load script from file
private string LoadScript()
{
    using var ofd = new OpenFileDialog
    {
        Filter = "Lua Files (*.lua)|*.lua|Text Files (*.txt)|*.txt|All Files (*.*)|*.*"
    };
    if (ofd.ShowDialog() != DialogResult.OK) return null;
    return File.ReadAllText(ofd.FileName, System.Text.Encoding.UTF8);
}

Configuration Pattern

LInjector uses app settings for persistent configuration:

// Reading/writing settings (App.config / user settings)
// In Settings.settings, add keys: Theme, FontSize, AutoInject

// Read
string theme = Properties.Settings.Default.Theme ?? "vs-dark";
int fontSize = Properties.Settings.Default.FontSize > 0
    ? Properties.Settings.Default.FontSize : 14;

// Write and save
Properties.Settings.Default.Theme = "vs-dark";
Properties.Settings.Default.FontSize = 16;
Properties.Settings.Default.Save();

// Apply theme to Monaco from C#
private void ApplyEditorTheme(string theme)
{
    webBrowser.Document.InvokeScript(
        "eval",
        new object[] { $"monaco.editor.setTheme('{theme}')" }
    );
}

Common Customization Patterns

Change Target Process

// Replace "RobloxPlayerBeta" with your target process name
private const string TARGET_PROCESS = "RobloxPlayerBeta";
// or for UWP:
// private const string TARGET_PROCESS = "Windows10Universal";

Add Custom Luau Autocomplete to Monaco

// In Monaco/index.html — register Luau-specific completions
monaco.languages.registerCompletionItemProvider('lua', {
    provideCompletionItems: function(model, position) {
        return {
            suggestions: [
                {
                    label: 'game',
                    kind: monaco.languages.CompletionItemKind.Variable,
                    insertText: 'game',
                    documentation: 'The root DataModel instance'
                },
                {
                    label: 'workspace',
                    kind: monaco.languages.CompletionItemKind.Variable,
                    insertText: 'workspace',
                    documentation: 'Alias for game.Workspace'
                },
                {
                    label: 'loadstring',
                    kind: monaco.languages.CompletionItemKind.Function,
                    insertText: 'loadstring(${1:source})()',
                    insertTextRules:
                        monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
                    documentation: 'Load and execute a string as Lua code'
                }
            ]
        };
    }
});

Troubleshooting

Fix Monaco Blank in WebBrowser Control

Add this to your app startup (requires running as admin once, or via installer):

// Force IE11 rendering mode for WebBrowser control
private static void SetWebBrowserEmulation()
{
    string appName = Path.GetFileName(Application.ExecutablePath);
    using var key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(
        @"SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION",
        writable: true);
    key?.SetValue(appName, 11001, Microsoft.Win32.RegistryValueKind.DWord);
}
// Call SetWebBrowserEmulation() in Program.cs before Application.Run()

Verify Target Process is Running

public static bool IsProcessRunning(string name)
    => Process.GetProcessesByName(name).Length > 0;

// Usage
if (!IsProcessRunning("RobloxPlayerBeta"))
{
    MessageBox.Show("Please launch Roblox before injecting.",
        "LInjector", MessageBoxButtons.OK, MessageBoxIcon.Warning);
    return;
}

Key Facts

Language: C# / .NET Framework 4.8
Platform: Windows, x86 (32-bit) only
Editor: Monaco (VS Code engine) with Lua/Luau syntax
Injection speed: ~300ms (when working)
Tab RAM cap: ~1 GB for 40+ tabs
License: MIT
Status (2026): UWP target patched by Hyperion; source remains functional for custom DLL targets

Adoption

aradotso/linjector-luau-script-ide

$ install --global

Security Scan Results

SKILL.md

LInjector Luau Script IDE

Project Structure

Build Requirements

How to Build

Monaco Editor Integration

Accessing the Monaco Editor from C#

Monaco Editor Host HTML (Monaco/index.html pattern)

Tab System

DLL Injection (Custom Integration)

Using the Injector from UI

Script Execution Pattern

Script File Management

Configuration Pattern

Common Customization Patterns

Change Target Process

Add Custom Luau Autocomplete to Monaco

Troubleshooting

Fix Monaco Blank in WebBrowser Control

Verify Target Process is Running

Key Facts

Related Skills

aradotso/skills/compose-performance-skills

aradotso/baguette-ios-simulator

aradotso/skills/claude-code-game-studios

aradotso/skills/xq-py-quantum-vm

aradotso/linjector-luau-script-ide

$ install --global

Security Scan Results

SKILL.md

LInjector Luau Script IDE

Project Structure

Build Requirements

How to Build

Monaco Editor Integration

Accessing the Monaco Editor from C#

Monaco Editor Host HTML (Monaco/index.html pattern)

Tab System

DLL Injection (Custom Integration)

Using the Injector from UI

Script Execution Pattern

Script File Management

Configuration Pattern

Common Customization Patterns

Change Target Process

Add Custom Luau Autocomplete to Monaco

Troubleshooting

Fix Monaco Blank in WebBrowser Control

Verify Target Process is Running

Key Facts

Related Skills

aradotso/skills/compose-performance-skills

aradotso/baguette-ios-simulator

aradotso/skills/claude-code-game-studios

aradotso/skills/xq-py-quantum-vm