C# 屏蔽windows功能键
对于触屏的软件来说,我们调出系统键盘以后,我们不想用户回到桌面,这时候我们就需要屏蔽windows键,
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#region 屏蔽WIN功能键 public delegate int HookProc(int nCode, int wParam, IntPtr lParam); private static int hHook = 0; public const int WH_KEYBOARD_LL = 13; //LowLevel键盘截获,如果是WH_KEYBOARD=2,并不能对系统键盘截取,会在你截取之前获得键盘。 private static HookProc KeyBoardHookProcedure; //键盘Hook结构函数 [StructLayout(LayoutKind.Sequential)] public class KeyBoardHookStruct { public int vkCode; public int scanCode; public int flags; public int time; public int dwExtraInfo; } //设置钩子 [DllImport("user32.dll")] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] //抽掉钩子 public static extern bool UnhookWindowsHookEx(int idHook); [DllImport("user32.dll")] //调用下一个钩子 public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam); [DllImport("kernel32.dll")] public static extern int GetCurrentThreadId(); [DllImport("kernel32.dll")] public static extern IntPtr GetModuleHandle(string name); public static void Hook_Start() { // 安装键盘钩子 if (hHook == 0) { KeyBoardHookProcedure = new HookProc(KeyBoardHookProc); hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0); //如果设置钩子失败. if (hHook == 0) { Hook_Clear(); } } } //取消钩子事件 public static void Hook_Clear() { bool retKeyboard = true; if (hHook != 0) { retKeyboard = UnhookWindowsHookEx(hHook); hHook = 0; } //如果去掉钩子失败. if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed."); } //这里可以添加自己想要的信息处理 private static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam) { if (nCode >= 0) { KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct)); if (kbh.vkCode == 91) // 截获左win(开始菜单键) { return 1; } if (kbh.vkCode == 92)// 截获右win { return 1; } if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截获Ctrl+Esc { return 1; } if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+f4 { return 1; } if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+tab { return 1; } if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift+Esc { return 1; } if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+空格 { return 1; } if (kbh.vkCode == 241) //截获F1 { return 1; } if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt + (int)Keys.Delete) //截获Ctrl+Alt+Delete { return 1; } if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift { return 1; } if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt) //截获Ctrl+Alt+空格 { return 1; } } return CallNextHookEx(hHook, nCode, wParam, lParam); } public static void TaskMgrLocking(bool bLock) { if (bLock) { try { RegistryKey r = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System", true); r.SetValue("DisableTaskmgr", "1"); //屏蔽任务管理器 } catch { RegistryKey r = Registry.CurrentUser.CreateSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System"); r.SetValue("DisableTaskmgr", "0"); } } else { Registry.CurrentUser.DeleteSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System"); } } #endregion // 调用,这个需要放在主窗体的load方法中 //private void Load(object sender, EventArgs e) //{ // Hook_Start(); //} //卸载 private void FormClosing(object sender, FormClosingEventArgs e) { Hook_Clear(); }
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