Hook Lwin and Rwin Button

Add a new class to your project and paste this code: 

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class KeyboardFilter
{
    private Keys[] mFilter;
    private IntPtr mHook;
    private LowLevelKeyboardProc mProc;
    public KeyboardFilter(Keys[] keysToFilter)
    {
        // Install hook
        mFilter = keysToFilter;
        ProcessModule mod = Process.GetCurrentProcess().MainModule;
        mProc = new LowLevelKeyboardProc(KeyboardProc); // Avoid garbage collector problems
        mHook = SetWindowsHookEx(13, mProc, GetModuleHandle(mod.ModuleName), 0);
        if (mHook == IntPtr.Zero) throw new Win32Exception(Marshal.GetLastWin32Error(), "Failed to set hook");
    }
    public void Dispose()
    {
        // Release hook
        if (mHook != IntPtr.Zero)
        {
            UnhookWindowsHookEx(mHook);
            mHook = IntPtr.Zero;
        }
    }
    private IntPtr KeyboardProc(int nCode, IntPtr wp, IntPtr lp)
    {
        // Callback, filter key
        if (nCode >= 0)
        {
            KBDLLHOOKSTRUCT info = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lp, typeof(KBDLLHOOKSTRUCT));
            foreach (Keys key in mFilter)
                if ((key & Keys.KeyCode) == info.key && CheckModifier(key)) return (IntPtr)1;
        }
        return CallNextHookEx(mHook, nCode, wp, lp);
    }
    private bool CheckModifier(Keys key)
    {
        // Check if modifier key in required state
        if ((key & Keys.Control) == Keys.Control &&
        GetAsyncKeyState(Keys.LControlKey) == 0 && GetAsyncKeyState(Keys.RControlKey) == 0) return false;
        if ((key & Keys.Shift) == Keys.Shift &&
        GetAsyncKeyState(Keys.LShiftKey) == 0 && GetAsyncKeyState(Keys.RShiftKey) == 0) 
        return false;
        if ((key & Keys.Alt) == Keys.Alt &&
        GetAsyncKeyState(Keys.LMenu) == 0 && GetAsyncKeyState(Keys.RMenu) == 0) 
        return false;
        return true;
    }
    // P/Invoke declarations
    [StructLayout(LayoutKind.Sequential)]
    private struct KBDLLHOOKSTRUCT
    {
        public Keys key;
        public int scanCode;
        public int flags;
        public int time;
        public IntPtr extra;
    }
    private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr SetWindowsHookEx(int id, LowLevelKeyboardProc callback, IntPtr hMod, uint dwThreadId);
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern bool UnhookWindowsHookEx(IntPtr hook);
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr CallNextHookEx(IntPtr hook, int nCode, IntPtr wp, IntPtr lp);
    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr GetModuleHandle(string name);
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    private static extern short GetAsyncKeyState(Keys key);
} 
 
Add this line to your main form: 
 
KeyboardFilter filter = new KeyboardFilter(new Keys[] { Keys.LWin, Keys.RWin, Keys.Escape | Keys.Control });