如何在c＃中使用低级键盘钩子来抑制任务切换键（winkey，alt-tab，alt-esc，ctrl-esc）

谁能告诉我如何使用c＃禁用任务切换键

Answer 1

我有完整的代码来禁用Windows Key ， Alt + Tab等等。

现在我提供以下代码作为其他人的参考：

/* Code to Disable WinKey, Alt+Tab, Ctrl+Esc Starts Here */ // Structure contain information about low-level keyboard input event [StructLayout(LayoutKind.Sequential)] private struct KBDLLHOOKSTRUCT { public Keys key; public int scanCode; public int flags; public int time; public IntPtr extra; } //System level functions to be used for hook and unhook keyboard input 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); //Declaring Global objects 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)); // Disabling Windows keys if (objKeyInfo.key == Keys.RWin || objKeyInfo.key == Keys.LWin || objKeyInfo.key == Keys.Tab && HasAltModifier(objKeyInfo.flags) || objKeyInfo.key == Keys.Escape && (ModifierKeys & Keys.Control) == Keys.Control) { return (IntPtr)1; // if 0 is returned then All the above keys will be enabled } } return CallNextHookEx(ptrHook, nCode, wp, lp); } bool HasAltModifier(int flags) { return (flags & 0x20) == 0x20; } /* Code to Disable WinKey, Alt+Tab, Ctrl+Esc Ends Here */ 

然后在Form_Load（）内;

  private void Form_Load(object sender, EventArgs e) { ProcessModule objCurrentModule = Process.GetCurrentProcess().MainModule; objKeyboardProcess = new LowLevelKeyboardProc(captureKey); ptrHook = SetWindowsHookEx(13, objKeyboardProcess, GetModuleHandle(objCurrentModule.ModuleName), 0); } 

Answer 2

您可以使用OnKeyDown事件捕获按下的键并禁止您不想允许的键。

Scott Hanselman的BabySmash应用程序确实禁用了大多数关键笔划，例如alt-tab alt-esc等。大多数源代码和开发都可以在他的博客上找到。 源代码在GitHub上 。 在源代码中，您将看到他使用许多win32调用的InterceptKeys类来获取按下的键的低级别挂钩。 然后，他在App.xaml.cs文件中的HookCallback中处理这些。 希望这可以帮助。

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