Initial commit — FuckCapsLock v1

2026-06-30 16:58:13 -07:00
commit b6cb6e0969
13 changed files with 2104 additions and 0 deletions
--- a/Program.cs
+++ b/Program.cs
@@ -0,0 +1,115 @@
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using Microsoft.Win32;
+
+static class Program
+{
+    const int WH_KEYBOARD_LL = 13;
+    const int VK_CAPITAL = 0x14;
+
+    delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+    static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    static extern bool UnhookWindowsHookEx(IntPtr hhk);
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+    static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
+
+    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+    static extern IntPtr GetModuleHandle(string lpModuleName);
+
+    [StructLayout(LayoutKind.Sequential)]
+    struct KBDLLHOOKSTRUCT
+    {
+        public uint vkCode;
+        public uint scanCode;
+        public uint flags;
+        public uint time;
+        public IntPtr dwExtraInfo;
+    }
+
+    static LowLevelKeyboardProc _proc = HookCallback;
+    static IntPtr _hookId = IntPtr.Zero;
+    static NotifyIcon? _trayIcon;
+
+    [STAThread]
+    static void Main()
+    {
+        RegisterStartup();
+
+        using var mutex = new Mutex(true, @"Global\FuckCapsLock", out var createdNew);
+        if (!createdNew)
+            return;
+
+        _hookId = SetHook(_proc);
+        if (_hookId == IntPtr.Zero)
+            return;
+
+        ApplicationConfiguration.Initialize();
+
+        using var form = new Form();
+        form.WindowState = FormWindowState.Minimized;
+        form.ShowInTaskbar = false;
+        form.Load += (_, _) => form.Hide();
+
+        _trayIcon = new NotifyIcon
+        {
+            Icon = SystemIcons.Application,
+            Text = "FuckCapsLock",
+            ContextMenuStrip = new ContextMenuStrip()
+        };
+        _trayIcon.ContextMenuStrip.Items.Add("Exit", null, (_, _) =>
+        {
+            _trayIcon.Visible = false;
+            Application.Exit();
+        });
+        _trayIcon.Visible = true;
+
+        Application.Run(form);
+
+        UnhookWindowsHookEx(_hookId);
+    }
+
+    static void RegisterStartup()
+    {
+        try
+        {
+            using var key = Registry.CurrentUser.OpenSubKey(
+                @"Software\Microsoft\Windows\CurrentVersion\Run", true);
+            if (key is null) return;
+
+            var path = Environment.ProcessPath;
+            if (path is null) return;
+
+            var value = path.Contains(' ') ? $"\"{path}\"" : path;
+
+            var existing = key.GetValue("FuckCapsLock") as string;
+            if (!string.Equals(existing, value, StringComparison.OrdinalIgnoreCase))
+                key.SetValue("FuckCapsLock", value);
+        }
+        catch { }
+    }
+
+    static IntPtr SetHook(LowLevelKeyboardProc proc)
+    {
+        using var curProcess = Process.GetCurrentProcess();
+        using var curModule = curProcess.MainModule;
+        return SetWindowsHookEx(WH_KEYBOARD_LL, proc,
+            GetModuleHandle(curModule!.ModuleName), 0);
+    }
+
+    static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
+    {
+        if (nCode >= 0)
+        {
+            var hookStruct = Marshal.PtrToStructure<KBDLLHOOKSTRUCT>(lParam);
+            if (hookStruct.vkCode == VK_CAPITAL)
+                return (IntPtr)1;
+        }
+        return CallNextHookEx(_hookId, nCode, wParam, lParam);
+    }
+}