Заблокировать клавишу Windows

 using System.Diagnostics;  
using System.Runtime.InteropServices;

[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;

ProcessModule objCurrentModule = Process.GetCurrentProcess().MainModule;
objKeyboardProcess = new LowLevelKeyboardProc(captureKey); 
 ptrHook = SetWindowsHookEx(13, objKeyboardProcess, GetModuleHandle(objCurrentModule.ModuleName),0);

private IntPtr captureKey(int nCode, IntPtr wp, IntPtr lp)  
 {
if (nCode >= 0)  
 {  
 KBDLLHOOKSTRUCT objKeyInfo = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lp, typeof(KBDLLHOOKSTRUCT)); 
if (objKeyInfo.key == Keys.RWin || objKeyInfo.key == Keys.LWin) //вот тут и блокируется WinKey {   
 return (IntPtr)1;  
 } 
  } 
return CallNextHookEx(ptrHook, nCode, wp, lp);  
 }

protected override void Dispose(bool disposing) 
 { 
 if (disposing && (components != null))
{ 
components.Dispose();  
 } 
 if (ptrHook != IntPtr.Zero) 
  {  
 UnhookWindowsHookEx(ptrHook);
 ptrHook = IntPtr.Zero;
}  
base.Dispose(disposing);
 }