# Linjector Luau Script Ide > Open-source Luau/Lua script IDE and executor built as a Windows Forms C# application with Monaco editor integration - Skill: `aradotso-trending-skills/linjector-luau-script-ide` (Agent Skill) - Install (CLI): `npx skillmds@latest add aradotso-trending-skills/linjector-luau-script-ide` - Raw SKILL.md: https://api.skillmd.com/api/skills/aradotso-trending-skills/linjector-luau-script-ide/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Integrations & APIs - Author: aradotso (https://skillmd.com/u/aradotso-trending-skills) - Updated: 2026-09-10 - Page: https://skillmd.com/skills/aradotso-trending-skills/linjector-luau-script-ide --- # 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

``` --- ## 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 _tabs = new List(); 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; ///

/// Inject a DLL into a target process by name. /// Returns true on success. ///

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 ```csharp // 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 ```csharp // 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 ```csharp // 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: ```csharp // 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[] { $"monaco.editor.setTheme('{theme}')" } ); } ``` --- ## Common Customization Patterns ### Change Target Process ```csharp // Replace "RobloxPlayerBeta" with your target process name private const string TARGET_PROCESS = "RobloxPlayerBeta"; // or for UWP: // private const string TARGET_PROCESS = "Windows10Universal"; ``` ### Add Custom Luau Autocomplete to Monaco ```javascript // In Monaco/index.html — register Luau-specific completions monaco.languages.registerCompletionItemProvider('lua', { provideCompletionItems: function(model, position) { return { suggestions: [ { label: 'game', kind: monaco.languages.CompletionItemKind.Variable, insertText: 'game', documentation: 'The root DataModel instance' }, { label: 'workspace', kind: monaco.languages.CompletionItemKind.Variable, insertText: 'workspace', documentation: 'Alias for game.Workspace' }, { label: 'loadstring', kind: monaco.languages.CompletionItemKind.Function, insertText: 'loadstring(${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): ```csharp // 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 ```csharp 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