C#类 勾子 ，想在一个锁屏窗口屏蔽大部分能跳出界面的键盘按键，以下代码能运行，能调用，不报错，就是不起作用
0
悬赏园豆：100
[待解决问题]
class myHook
{
private IntPtr pKeyboardHook = IntPtr.Zero;//键盘钩子句柄
//钩子委托声明
public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
private HookProc KeyboardHookProcedure;//键盘钩子委托实例，不能省略变量
public const int idHook = 13;//底层键盘钩子
//安装钩子
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr pInstance, int threadID);
//卸载钩子
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(IntPtr pHookHandle);
//键盘钩子处理函数
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
KeyMSG m = (KeyMSG)Marshal.PtrToStructure(lParam, typeof(KeyMSG));//键盘消息处理
if (pKeyboardHook != IntPtr.Zero)//判断钩子句柄是否为空
{
switch (((Keys)m.vkCode))//判断按键
{
case Keys.LWin://键盘左侧的Win键
case Keys.RWin://键盘右侧的Win键
case Keys.Delete://Delete键
case Keys.Alt://Alt键
case Keys.Escape: //Esc键
case Keys.F4: //F4键
case Keys.Control://Ctrl键
case Keys.Tab://Tab键
return 1;//不执行任何操作
}
}
return 0;
}
//安装钩子方法
public bool InsertHook()
{
IntPtr pIn = (IntPtr)4194304;//将4194304转换为句柄
if (this.pKeyboardHook == IntPtr.Zero)//不存在钩子时
{
//创建钩子
this.KeyboardHookProcedure = new HookProc(KeyboardHookProc);
//使用SetWindowsHookEx函数安装钩子
this.pKeyboardHook = SetWindowsHookEx(idHook, KeyboardHookProcedure, pIn, 0);
if (this.pKeyboardHook == IntPtr.Zero)//如果安装钩子失败
{
this.UnInsertHook();//卸载钩子
return false;
}
}
return true;
}
//卸载钩子方法
public bool UnInsertHook()
{
bool result = true;
if (this.pKeyboardHook != IntPtr.Zero)//如果存在钩子
{
//使用UnhookWindowsHookEx函数卸载钩子
result = (UnhookWindowsHookEx(this.pKeyboardHook) && result);
this.pKeyboardHook = IntPtr.Zero;//清空指针
}
return result;
}
//键盘消息处理结构
[StructLayout(LayoutKind.Sequential)]
public struct KeyMSG
{
public int vkCode;//键盘按键
}
}
}
所有回答(1)
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权限够吗？挂钩子需要管理员权限
这个问题已经解决了，权限问题在软件运行时就已考虑。单独这个功能不能用，我就换了一套。
下面是调试成功的：
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 == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Alt) //新增截获alt+ESC
{
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
if(kbh.vkCode == (int)Keys.Delete && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt)
{
return 1;
}
if (kbh.vkCode == (int)Keys.Delete && ((int)Control.ModifierKeys == (int)Keys.Control+(int)Keys.Alt) )
{
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();
//}
}