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linjector-luau-script-ide

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Open-source Luau/Lua script IDE and executor built as a Windows Forms C# application with Monaco editor integration

General

What this skill does


# LInjector Luau Script IDE

> Skill by [ara.so](https://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

```bash
# 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#

```csharp
// 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)

```html
<!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.

```csharp
// 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:

```csharp
// 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 = Proc
Files: 1
Size: 15.9 KB
Complexity: 24/100
Category: General
Source: https://github.com/aradotso/trending-skills/tree/main/skills/linjector-luau-script-ide

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