我使用以下代码禁用Alt + Tab,Alt + Esc,Ctrl + Esc和Windows Key,但不知何故它无效。请帮我纠正。
namespace BlockShortcuts
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private delegate int LowLevelKeyboardProcDelegate(int nCode, int
wParam, ref KBDLLHOOKSTRUCT lParam);
[DllImport("user32.dll", EntryPoint = "SetWindowsHookExA", CharSet = CharSet.Ansi)]
private static extern int SetWindowsHookEx(
int idHook,
LowLevelKeyboardProcDelegate lpfn,
int hMod,
int dwThreadId);
[DllImport("user32.dll")]
private static extern int UnhookWindowsHookEx(int hHook);
[DllImport("user32.dll", EntryPoint = "CallNextHookEx", CharSet = CharSet.Ansi)]
private static extern int CallNextHookEx(
int hHook, int nCode,
int wParam, ref KBDLLHOOKSTRUCT lParam);
const int WH_KEYBOARD_LL = 13;
private int intLLKey;
private KBDLLHOOKSTRUCT lParam;
private struct KBDLLHOOKSTRUCT
{
public int vkCode;
int scanCode;
public int flags;
int time;
int dwExtraInfo;
}
private int LowLevelKeyboardProc(
int nCode, int wParam,
ref KBDLLHOOKSTRUCT lParam)
{
bool blnEat = false;
switch (wParam)
{
case 256:
case 257:
case 260:
case 261:
//Alt+Tab, Alt+Esc, Ctrl+Esc, Windows Key
if (((lParam.vkCode == 9) && (lParam.flags == 32)) ||
((lParam.vkCode == 27) && (lParam.flags == 32)) || ((lParam.vkCode ==
27) && (lParam.flags == 0)) || ((lParam.vkCode == 91) && (lParam.flags
== 1)) || ((lParam.vkCode == 92) && (lParam.flags == 1)) || ((true) &&
(lParam.flags == 32)))
{
blnEat = true;
}
break;
}
if (blnEat)
return 1;
else return CallNextHookEx(0, nCode, wParam, ref lParam);
}
private void KeyboardHook(object sender, EventArgs e)
{
intLLKey = SetWindowsHookEx(WH_KEYBOARD_LL,new LowLevelKeyboardProcDelegate(LowLevelKeyboardProc),
System.Runtime.InteropServices.Marshal.GetHINSTANCE(
System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0]).ToInt32(), 0);
}
private void ReleaseKeyboardHook()
{
intLLKey = UnhookWindowsHookEx(intLLKey);
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
KeyboardHook(this, e);
else
ReleaseKeyboardHook();
}
}
}
答案 0 :(得分:6)
一般来说代码工作得很好。您目击的效果可能源于在Visual Studio调试器下运行,这通常意味着您正在运行 Visual Studio Hosting Process (vshost.exe)。
这意味着System.Reflection.Assembly.GetExecutingAssembly()
函数中对KeyboardHook()
的调用返回的是vshost.exe而不是可执行文件,因此无法实现为可执行文件安装挂钩所需的效果。
因此,要查看您的代码生效,您必须执行以下操作之一:
请注意,你可以disable the Visual Studio Hosting Process,但请注意潜在的副作用,引用:
禁用托管过程时 几个调试功能 不可用或经验减少 性能。有关更多信息,请参阅 Debugging and the Hosting Process
答案 1 :(得分:1)
您可以查看我对here相关问题的回答。
请注意RegisterLowLevelHook
方法的区别(您称之为KeyboardHook
方法,因此您知道要比较的内容)。即使从VS调试,我也没有遇到任何问题。
基本上,正如其他人所说,不要使用GetExecutingAssembly
方法,而是使用我在其他答案中列出的方法。
以下是您感兴趣的一项功能的摘录:
private IntPtr RegisterLowLevelHook(LowLevelKeyboardProc hook)
{
IntPtr handle = IntPtr.Zero;
using (Process currentProcess = Process.GetCurrentProcess())
using (ProcessModule currentModule = currentProcess.MainModule)
{
IntPtr module = Kernel32.GetModuleHandle(currentModule.ModuleName);
handle = User32.SetWindowsHookEx(HookType.KEYBOARD_LL, hook, module, 0);
}
return handle;
}