Как отключить определенную клавишу(например, Tab) в приложении.

using System;
using System.Diagnostics;
using System.Security.Principal;
using System.Runtime.InteropServices;
using System.Windows.Forms;
 
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
[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);
 
private IntPtr ptrHook;
private LowLevelKeyboardProc objKeyboardProcess; 
 
private IntPtr captureKey(int nCode, IntPtr wp, IntPtr lp)
{
if (nCode >= 0)
{
KBDLLHOOKSTRUCT objKeyInfo = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lp, typeof(KBDLLHOOKSTRUCT));
if (objKeyInfo.key == Keys.PrintScreen) // перехватываем
{
MessageBox.Show("Запрет");
if (Clipboard.ContainsImage())
{
Clipboard.Clear();
}
return (IntPtr)1;
}
}
return CallNextHookEx(ptrHook, nCode, wp, lp);
}
 
protected override void Dispose(bool disposing)
{
if (ptrHook != IntPtr.Zero)
{
UnhookWindowsHookEx(ptrHook);
ptrHook = IntPtr.Zero;
}
base.Dispose(disposing);
}
 
public Form1()
{
ProcessModule objCurrentModule = Process.GetCurrentProcess().MainModule; 
objKeyboardProcess = new LowLevelKeyboardProc(captureKey);
ptrHook = SetWindowsHookEx(13, objKeyboardProcess, GetModuleHandle(objCurrentModule.ModuleName), 0);
 
//InitializeComponent();
}
 
private void Form1_Load(object sender, System.EventArgs e)
{
}
}
}

    public partial class Form1 : Form
    {
        protected override bool ProcessDialogKey(Keys keyData)
        {
            switch (keyData)
            {
                case Keys.Tab:
                    return true;
                default:
                    return base.ProcessDialogKey(keyData);
            }
        }
    }

public const int WM_LBUTTONDOWN = 0x201;
        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case WM_LBUTTONDOWN:
                    {
                        MessageBox.Show("Нажата левая кнопка");
                        break;
                    }
            }
            base.WndProc(ref m);
        }