我想dissable窗口键，打开开始菜单，在我的WPF桌面应用。目的是安全功能，用户不能做任何工作，而开放的应用程序做其他工作的唯一办法是关闭该应用程序。我已经试过命令绑定和关键挂钩和OnPreviewKeydown和OnPreviewKeyUp的，但没有工作。
这是可能的，到dissable WPF中获胜的关键。如果是的话，请帮助一个例子。
我试过到目前为止protected override void OnPreviewKeyDown(KeyEventArgs e)
{
if (e.Key == Key.System) //this will catch alt-tab, alt-esc- alt-f4 etc. BUT NOT CONSISTANTLY!
{
e.Handled = true;
return;
}
if (e.Key == Key.LWin||e.Key==Key.RWin)
{
e.Handled = true;
return;
}
}
和================================================= ===========
{C}
和================================================= ===========
using System;
public class globalKeyboardHook
{
#region Constant, Structure and Delegate Definitions
/// <summary>
/// defines the callback type for the hook
/// </summary>
public delegate int keyboardHookProc(int code, int wParam, ref keyboardHookStruct lParam);
public struct keyboardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
const int WH_KEYBOARD_LL = 13;
const int WM_KEYDOWN = 0x100;
const int WM_KEYUP = 0x101;
const int WM_SYSKEYDOWN = 0x104;
const int WM_SYSKEYUP = 0x105;
#endregion
#region Instance Variables
/// <summary>
/// The collections of keys to watch for
/// </summary>
public List<Key> HookedKeys = new List<Key>();
/// <summary>
/// Handle to the hook, need this to unhook and call the next hook
/// </summary>
IntPtr hhook = IntPtr.Zero;
#endregion
#region Events
/// <summary>
/// Occurs when one of the hooked keys is pressed
/// </summary>
public event KeyEventHandler KeyDown;
/// <summary>
/// Occurs when one of the hooked keys is released
/// </summary>
public event KeyEventHandler KeyUp;
#endregion
#region Constructors and Destructors
/// <summary>
/// Initializes a new instance of the <see cref="globalKeyboardHook"/> class and installs the keyboard hook.
/// </summary>
public globalKeyboardHook()
{
hook();
}
/// <summary>
/// distructor of hook
/// </summary>
globalKeyboardHook()
{
unhook();
}
#endregion
#region Public Methods
/// <summary>
/// Installs the global hook
/// </summary>
public void hook()
{
//keyboardHookProc hook = new keyboardHookProc(hookProc);
IntPtr hInstance = LoadLibrary("User32");
hhook = SetWindowsHookExA(WH_KEYBOARD_LL, hookProc, hInstance, 0);
}
/// <summary>
/// Uninstalls the global hook
/// </summary>
public void unhook()
{
UnhookWindowsHookEx(hhook);
}
/// <summary>
/// The callback for the keyboard hook
/// </summary>
/// <param name="code">The hook code, if it isn't >