锁屏时禁用系统按键

Author: JiuLing-zhang

src/ComputerLock.csproj

@@ -3,7 +3,7 @@
 	<PropertyGroup>
 		<Authors>九零</Authors>
 		<Product>透明锁屏</Product>
-		<Version>1.2.17.21</Version>
+		<Version>1.2.18.22</Version>
 		<Nullable>enable</Nullable>
 
 		<OutputType>WinExe</OutputType>

src/Hooks/SystemKeyHook.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace ComputerLock.Hooks;
+internal class SystemKeyHook : IDisposable
+{
+    // ReSharper disable InconsistentNaming
+    private const int WH_KEYBOARD_LL = 13;
+    private const int WM_KEYDOWN = 0x0100;
+
+    private const int VK_LWIN = 0x5B;
+    private const int VK_RWIN = 0x5C;
+    private const int VK_LCONTROL = 0xA2;
+    private const int VK_RCONTROL = 0xA3;
+    // ReSharper restore InconsistentNaming
+
+    private int _hookId;
+    private readonly HookDelegate _hookCallback;
+
+    public delegate int HookDelegate(int nCode, int wParam, IntPtr lParam);
+
+    [DllImport("user32.dll")]
+    public static extern int SetWindowsHookEx(int idHook, HookDelegate callback, IntPtr hInstance, uint threadId);
+
+    [DllImport("user32.dll")]
+    public static extern int UnhookWindowsHookEx(int idHook);
+
+    [DllImport("user32.dll")]
+    public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
+
+    [DllImport("kernel32.dll")]
+    public static extern IntPtr GetModuleHandle(string lpModuleName);
+
+
+    public SystemKeyHook()
+    {
+        _hookCallback = KeyboardHookCallback;
+    }
+
+    public void DisableSystemKey()
+    {
+        using Process curProcess = Process.GetCurrentProcess();
+        string? moduleName = curProcess.MainModule?.ModuleName;
+        if (moduleName == null)
+        {
+            return;
+        }
+        _hookId = SetWindowsHookEx(WH_KEYBOARD_LL, _hookCallback, GetModuleHandle(moduleName), 0);
+    }
+
+    private int KeyboardHookCallback(int nCode, int wParam, IntPtr lParam)
+    {
+        if (nCode >= 0 && wParam == WM_KEYDOWN)
+        {
+            int vkCode = Marshal.ReadInt32(lParam);
+            if (vkCode == VK_LWIN || vkCode == VK_RWIN || vkCode == VK_LCONTROL || vkCode == VK_RCONTROL)
+            {
+                return 1; // 阻止事件传递
+            }
+        }
+        return CallNextHookEx(_hookId, nCode, wParam, lParam);
+    }
+    public void Dispose()
+    {
+        UnhookWindowsHookEx(_hookId);
+    }
+}

src/LockService.cs

@@ -1,4 +1,5 @@
-using System;
+using ComputerLock.Hooks;
+using System;
 using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
@@ -15,7 +16,7 @@ public static LockService GetInstance()
 
     private bool _isLocked = false;
     private readonly FmLockScreen _fmLockScreen;
-
+    private readonly SystemKeyHook _systemKeyHook = new();
     private readonly List<FmLockScreenBlank> _blankScreens;
     private LockService()
     {
@@ -34,7 +35,7 @@ public void Lock()
         }
         _isLocked = true;
         TaskManagerHook.DisabledTaskManager();
-
+        _systemKeyHook.DisableSystemKey();
         if (_blankScreens.Any())
         {
             _blankScreens.Clear();
@@ -67,6 +68,7 @@ private void _fmLockScreen_OnUnlock(object? sender, EventArgs e)
             screen.Close();
         }
         TaskManagerHook.EnabledTaskManager();
+        _systemKeyHook.Dispose();
         _isLocked = false;
     }
     private void BlankScreen_OnDeviceInput(object? sender, EventArgs e)