C#屏蔽windows功能键

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，#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)
{
return1;
}
if (kbh.vkCode == 92)// 截获右win
{
return1;
}
if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截获Ctrl+Esc
{
return1;
}
if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+f4
{
return1;
}
if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+tab
{
return1;
}
if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift+Esc {
return1;
}
if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+空格
{
return1;
}
if (kbh.vkCode == 241) //截获F1
{
return1;
}
if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt + (int)Keys.Delete) //截获Ctrl+Alt+Delete
{
return1;
}
if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift
{
return1;
}
if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt) //截获Ctrl+Alt+空格
{
return1;
}
}
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(); }
View Code。