KeyboardBlockKeys - Keyboard blocker

Создаём класс NativeMethods.cs

namespace BlockKeyboardKeys
{
using System;
using System.Runtime.InteropServices;
using static BlockKeyboardKeys.KeyBlockHook;

internal static class NativeMethods
{
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool UnhookWindowsHookEx(IntPtr hhk);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

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

Code

namespace BlockKeyboardKeys

{

    using System;

    using System.Runtime.InteropServices;

    using static BlockKeyboardKeys.KeyBlockHook;



    internal static class NativeMethods

    {

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]

        public static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);



        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]

        public static extern bool UnhookWindowsHookEx(IntPtr hhk);



        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]

        public static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);



        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]

        public static extern IntPtr GetModuleHandle(string lpModuleName);

    }

}

Создадим класс KeyBlockHook.cs - Отвечает за блокировку всех клавиатурных клавиш.

namespace BlockKeyboardKeys
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;

internal class KeyBlockHook : IDisposable
{
public delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
private static readonly LowLevelKeyboardProc _proc = HookCallback;
private static IntPtr _hookID = IntPtr.Zero;

private bool _isDisposed;
private readonly bool True = true, False = false;

private const int WH_KEYBOARD_LL = 0xD;
private const int WM_KEYDOWN = 0x0100;
private const int WM_SYSKEYDOWN = 0x0104;

private static IntPtr SetHook(LowLevelKeyboardProc proc)
{
using (var curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
{
return NativeMethods.SetWindowsHookEx(WH_KEYBOARD_LL, proc, NativeMethods.GetModuleHandle(curModule.ModuleName), 0);
}
}

public void InstallHook() => _hookID = SetHook(_proc);

public void Dispose(bool disposing)
{
if (this._isDisposed)
{
return;
}

NativeMethods.UnhookWindowsHookEx(_hookID);
this._isDisposed = this.True;
}

~KeyBlockHook()
{
this.Dispose(this.False);
}

public void Dispose()
{
this.Dispose(this.True);
try
{
GC.SuppressFinalize(this);
}
catch (ArgumentNullException) { }
}

private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
try
{
var vkCode = Marshal.ReadInt32(lParam);
if (((nCode >= 0) && (wParam == (IntPtr)WM_KEYDOWN)) || (wParam == (IntPtr)WM_SYSKEYDOWN))
{
if (downKeys.Contains((Keys)vkCode))
{
Console.WriteLine($"Клавиша: {Convert.ToString((Keys)vkCode)} Блокирована!");
return (IntPtr)1; // Данная функция возвращает (IntPtr)1 - это и есть блокировка клавиш.
}
}
}
catch (AccessViolationException) { }
return NativeMethods.CallNextHookEx(_hookID, nCode, wParam, lParam);
}

/* Список клавиш для блокировки */
static readonly List<Keys> downKeys = new List<Keys>
{
Keys.LWin,
Keys.RWin,
Keys.Alt,
Keys.Tab,
Keys.CapsLock,
Keys.Back,
Keys.ControlKey,
Keys.Space,
Keys.LShiftKey,
Keys.RShiftKey,
Keys.Q,
Keys.W,
Keys.E,
Keys.R,
Keys.T,
Keys.Y,
Keys.U,
Keys.I,
Keys.O,
Keys.P,
Keys.A,
Keys.S,
Keys.D,
Keys.F,
Keys.G,
Keys.H,
Keys.J,
Keys.K,
Keys.L,
Keys.Z,
Keys.X,
Keys.C,
Keys.V,
Keys.B,
Keys.N,
Keys.M,
Keys.Oem1,
Keys.Oem102,
Keys.Oem2,
Keys.Oem3,
Keys.Oem4,
Keys.Oem5,
Keys.Oem6,
Keys.Oem7,
Keys.Oem8,
Keys.OemBackslash,
Keys.OemClear,
Keys.OemCloseBrackets,
Keys.Oemcomma,
Keys.OemMinus,
Keys.OemOpenBrackets,
Keys.OemPeriod,
Keys.OemPipe,
Keys.Oemplus,
Keys.OemQuestion,
Keys.OemQuotes,
Keys.OemSemicolon,
Keys.Oemtilde,
Keys.Pa1,
Keys.Packet,
Keys.Play,
Keys.Print,
Keys.PrintScreen,
Keys.Prior,
Keys.ProcessKey,
Keys.Next,
Keys.Multiply,
Keys.Modifiers,
Keys.MediaStop,
Keys.MediaPreviousTrack,
Keys.MediaPlayPause,
Keys.MediaNextTrack,
Keys.Scroll,
Keys.Select,
Keys.SelectMedia,
Keys.Separator,
Keys.Sleep,
Keys.Snapshot,
Keys.Subtract,
Keys.Add,
Keys.Apps,
Keys.Attn,
Keys.BrowserBack,
Keys.BrowserFavorites,
Keys.BrowserForward,
Keys.BrowserHome,
Keys.BrowserRefresh,
Keys.BrowserSearch,
Keys.BrowserStop,
Keys.Clear,
Keys.Crsel,
Keys.End,
Keys.Enter,
Keys.EraseEof,
Keys.Escape,
Keys.Execute,
Keys.Exsel,
Keys.F1,
Keys.F2,
Keys.F3,
Keys.F4,
Keys.F5,
Keys.F6,
Keys.F7,
Keys.F8,
Keys.F9,
Keys.F10,
Keys.F11,
Keys.F12,
Keys.F13,
Keys.F14,
Keys.F15,
Keys.F16,
Keys.F17,
Keys.F18,
Keys.F19,
Keys.F20,
Keys.F21,
Keys.F22,
Keys.F23,
Keys.F24,
Keys.D0,
Keys.D1,
Keys.D2,
Keys.D3,
Keys.D4,
Keys.D5,
Keys.D6,
Keys.D7,
Keys.D8,
Keys.D9,
Keys.Delete,
Keys.Divide,
Keys.Down,
Keys.Decimal,
Keys.FinalMode,
Keys.HanguelMode,
Keys.HangulMode,
Keys.HanjaMode,
Keys.Help,
Keys.IMEAccept,
Keys.IMEAceept,
Keys.IMEConvert,
Keys.IMEModeChange,
Keys.IMENonconvert,
Keys.Insert,
Keys.Home,
Keys.Control,
Keys.LControlKey,
Keys.RControlKey,
Keys.NumLock,
Keys.NumPad0,
Keys.NumPad1,
Keys.NumPad2,
Keys.NumPad3,
Keys.NumPad4,
Keys.NumPad5,
Keys.NumPad6,
Keys.NumPad7,
Keys.NumPad8,
Keys.NumPad9,
Keys.JunjaMode,
Keys.KanaMode,
Keys.KanjiMode,
Keys.KeyCode,
Keys.LaunchApplication1,
Keys.LaunchApplication2,
Keys.LaunchMail,
Keys.Left,
Keys.Right,
Keys.Up,
Keys.PageUp,
Keys.VolumeUp,
Keys.LineFeed,
Keys.LMenu,
Keys.RMenu,
Keys.MButton,
Keys.MediaNextTrack,
Keys.XButton1,
Keys.Zoom,
Keys.NoName
//Keys.XButton2
//Keys.LButton
};
}
}

Code

namespace BlockKeyboardKeys

{

    using System;

    using System.Collections.Generic;

    using System.Diagnostics;

    using System.Runtime.InteropServices;

    using System.Windows.Forms;



    internal class KeyBlockHook : IDisposable

    {

        public delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);

        private static readonly LowLevelKeyboardProc _proc = HookCallback;

        private static IntPtr _hookID = IntPtr.Zero;



        private bool _isDisposed;

        private readonly bool True = true, False = false;



        private const int WH_KEYBOARD_LL = 0xD;

        private const int WM_KEYDOWN = 0x0100;

        private const int WM_SYSKEYDOWN = 0x0104;



        private static IntPtr SetHook(LowLevelKeyboardProc proc)

        {

            using (var curProcess = Process.GetCurrentProcess())

            using (ProcessModule curModule = curProcess.MainModule)

            {

                return NativeMethods.SetWindowsHookEx(WH_KEYBOARD_LL, proc, NativeMethods.GetModuleHandle(curModule.ModuleName), 0);

            }

        }



        public void InstallHook() => _hookID = SetHook(_proc);



        public void Dispose(bool disposing)

        {

            if (this._isDisposed)

            {

                return;

            }



            NativeMethods.UnhookWindowsHookEx(_hookID);

            this._isDisposed = this.True;

        }



        ~KeyBlockHook()

        {

            this.Dispose(this.False);

        }



        public void Dispose()

        {

            this.Dispose(this.True);

            try

            {

                GC.SuppressFinalize(this);

            }

            catch (ArgumentNullException) { }

        }



        private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)

        {

            try

            {

                var vkCode = Marshal.ReadInt32(lParam);

                if (((nCode >= 0) && (wParam == (IntPtr)WM_KEYDOWN)) || (wParam == (IntPtr)WM_SYSKEYDOWN))

                {

                    if (downKeys.Contains((Keys)vkCode))

                    {

                        Console.WriteLine($"Клавиша: {Convert.ToString((Keys)vkCode)} Блокирована!");

                        return (IntPtr)1; // Данная функция возвращает (IntPtr)1 - это и есть блокировка клавиш.

                    }

                }

            }

            catch (AccessViolationException) { }

            return NativeMethods.CallNextHookEx(_hookID, nCode, wParam, lParam);

        }



        /* Список клавиш для блокировки */

        static readonly List<Keys> downKeys = new List<Keys>

        {

           Keys.LWin,

           Keys.RWin,

           Keys.Alt,

           Keys.Tab,

           Keys.CapsLock,

           Keys.Back,

           Keys.ControlKey,

           Keys.Space,

           Keys.LShiftKey,

           Keys.RShiftKey,

           Keys.Q,

           Keys.W,

           Keys.E,

           Keys.R,

           Keys.T,

           Keys.Y,

           Keys.U,

           Keys.I,

           Keys.O,

           Keys.P,

           Keys.A,

           Keys.S,

           Keys.D,

           Keys.F,

           Keys.G,

           Keys.H,

           Keys.J,

           Keys.K,

           Keys.L,

           Keys.Z,

           Keys.X,

           Keys.C,

           Keys.V,

           Keys.B,

           Keys.N,

           Keys.M,

           Keys.Oem1,

           Keys.Oem102,

           Keys.Oem2,

           Keys.Oem3,

           Keys.Oem4,

           Keys.Oem5,

           Keys.Oem6,

           Keys.Oem7,

           Keys.Oem8,

           Keys.OemBackslash,

           Keys.OemClear,

           Keys.OemCloseBrackets,

           Keys.Oemcomma,

           Keys.OemMinus,

           Keys.OemOpenBrackets,

           Keys.OemPeriod,

           Keys.OemPipe,

           Keys.Oemplus,

           Keys.OemQuestion,

           Keys.OemQuotes,

           Keys.OemSemicolon,

           Keys.Oemtilde,

           Keys.Pa1,

           Keys.Packet,

           Keys.Play,

           Keys.Print,

           Keys.PrintScreen,

           Keys.Prior,

           Keys.ProcessKey,

           Keys.Next,

           Keys.Multiply,

           Keys.Modifiers,

           Keys.MediaStop,

           Keys.MediaPreviousTrack,

           Keys.MediaPlayPause,

           Keys.MediaNextTrack,

           Keys.Scroll,

           Keys.Select,

           Keys.SelectMedia,

           Keys.Separator,

           Keys.Sleep,

           Keys.Snapshot,

           Keys.Subtract,

           Keys.Add,

           Keys.Apps,

           Keys.Attn,

           Keys.BrowserBack,

           Keys.BrowserFavorites,

           Keys.BrowserForward,

           Keys.BrowserHome,

           Keys.BrowserRefresh,

           Keys.BrowserSearch,

           Keys.BrowserStop,

           Keys.Clear,

           Keys.Crsel,

           Keys.End,

           Keys.Enter,

           Keys.EraseEof,

           Keys.Escape,

           Keys.Execute,

           Keys.Exsel,

           Keys.F1,

           Keys.F2,

           Keys.F3,

           Keys.F4,

           Keys.F5,

           Keys.F6,

           Keys.F7,

           Keys.F8,

           Keys.F9,

           Keys.F10,

           Keys.F11,

           Keys.F12,

           Keys.F13,

           Keys.F14,

           Keys.F15,

           Keys.F16,

           Keys.F17,

           Keys.F18,

           Keys.F19,

           Keys.F20,

           Keys.F21,

           Keys.F22,

           Keys.F23,

           Keys.F24,

           Keys.D0,

           Keys.D1,

           Keys.D2,

           Keys.D3,

           Keys.D4,

           Keys.D5,

           Keys.D6,

           Keys.D7,

           Keys.D8,

           Keys.D9,

           Keys.Delete,

           Keys.Divide,

           Keys.Down,

           Keys.Decimal,

           Keys.FinalMode,

           Keys.HanguelMode,

           Keys.HangulMode,

           Keys.HanjaMode,

           Keys.Help,

           Keys.IMEAccept,

           Keys.IMEAceept,

           Keys.IMEConvert,

           Keys.IMEModeChange,

           Keys.IMENonconvert,

           Keys.Insert,

           Keys.Home,

           Keys.Control,

           Keys.LControlKey,

           Keys.RControlKey,

           Keys.NumLock,

           Keys.NumPad0,

           Keys.NumPad1,

           Keys.NumPad2,

           Keys.NumPad3,

           Keys.NumPad4,

           Keys.NumPad5,

           Keys.NumPad6,

           Keys.NumPad7,

           Keys.NumPad8,

           Keys.NumPad9,

           Keys.JunjaMode,

           Keys.KanaMode,

           Keys.KanjiMode,

           Keys.KeyCode,

           Keys.LaunchApplication1,

           Keys.LaunchApplication2,

           Keys.LaunchMail,

           Keys.Left,

           Keys.Right,

           Keys.Up,

           Keys.PageUp,

           Keys.VolumeUp,

           Keys.LineFeed,

           Keys.LMenu,

           Keys.RMenu,

           Keys.MButton,

           Keys.MediaNextTrack,

           Keys.XButton1,

           Keys.Zoom,

           Keys.NoName

           //Keys.XButton2

           //Keys.LButton

        };

    }

}

Теперь остаётся только правильно вызвать блокировку делается это так:

namespace BlockKeyboardKeys
{
using System;
using System.Windows.Forms;

internal partial class Program
{
[STAThread]
private static void Main()
{
// Так как метод реализует IDispossable то оборачиваем в using (...)
using (var shh = new KeyBlockHook())
{
shh.InstallHook(); // запускаем хук
Application.Run(); // запускаем форму.
}
}
}
}

Code

namespace BlockKeyboardKeys

{

    using System;

    using System.Windows.Forms;



    internal partial class Program

    {

        [STAThread]

        private static void Main()

        {

            // Так как метод реализует IDispossable то оборачиваем в using (...)

            using (var shh = new KeyBlockHook())

            {

                shh.InstallHook(); // запускаем хук

                Application.Run(); // запускаем форму.

            }

        }

    }

}

Ссылка на программу с исходниками: https://yadi.sk/d/90-swEoNW7_uLw
Дополнительная ссылка: https://mega.nz/#!6KRQQYjS!-keqG6aAMdx4fKaLG7OXz0fkmKW8bIyk9zfS9_kXLvk