全局键盘挂钩,不会禁止用户在表格外输入 [英] Global keyboard hook that doesn't disable user input outside of form
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问题描述
因此,我正在尝试为C#查找全局键盘挂钩.我发现了一个可以钩住键盘的类,但是它禁用了表单之外的键盘.这是当前的键盘挂钩:
So i'm trying to find a global keyboard hook for C#. I found a class that worked to hook the keyboard, but it disabled the keyboard outside of the form. This is the current keyboard hook:
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace Project
{
class globalKeyboardHook
{
public delegate int keyboardHookProc(int code, int wParam, ref keyboardHookStruct lParam);
public struct keyboardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
const int WH_KEYBOARD_LL = 13;
const int WM_KEYDOWN = 0x100;
const int WM_KEYUP = 0x101;
const int WM_SYSKEYDOWN = 0x104;
const int WM_SYSKEYUP = 0x105;
public List<Keys> HookedKeys = new List<Keys>();
IntPtr hhook = IntPtr.Zero;
public keyboardHookProc SAFE_delegate_callback;
public event KeyEventHandler KeyDown;
public event KeyEventHandler KeyUp;
public globalKeyboardHook()
{
hook();
}
~globalKeyboardHook()
{
unhook();
}
public void hook()
{
IntPtr hInstance = LoadLibrary("User32");
SAFE_delegate_callback = new keyboardHookProc(hookProc);
hhook = SetWindowsHookEx(WH_KEYBOARD_LL, SAFE_delegate_callback, hInstance, 0);
}
public void unhook()
{
UnhookWindowsHookEx(hhook);
}
public int hookProc(int code, int wParam, ref keyboardHookStruct lParam)
{
try
{
if (code >= 0)
{
Keys key = (Keys)lParam.vkCode;
if (HookedKeys.Contains(key))
{
KeyEventArgs kea = new KeyEventArgs(key);
if ((wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) && (KeyDown != null))
{
KeyDown(this, kea);
}
else if ((wParam == WM_KEYUP || wParam == WM_SYSKEYUP) && (KeyUp != null))
{
KeyUp(this, kea);
}
if (kea.Handled)
return 1;
}
}
return CallNextHookEx(hhook, code, wParam, ref lParam);
}
catch { return 0; }
}
[DllImport("user32.dll")]
static extern IntPtr SetWindowsHookEx(int idHook, keyboardHookProc callback, IntPtr hInstance, uint threadId);
[DllImport("user32.dll")]
static extern bool UnhookWindowsHookEx(IntPtr hInstance);
[DllImport("user32.dll")]
static extern int CallNextHookEx(IntPtr idHook, int nCode, int wParam, ref keyboardHookStruct lParam);
[DllImport("kernel32.dll")]
static extern IntPtr LoadLibrary(string lpFileName);
}
}
有人会知道如何更改现有的钩子,以便它仍然允许用户键入,或者知道执行此操作的另一个示例.
Would anyone know how to change the exisiting hook so that it still allows the user to type, or know of another example that does this.
谢谢.
推荐答案
Hans Passant发表了评论.我在这里看了这段代码:
Following a comment by Hans Passant. I looked at this bit of code here:
if (kea.Handled)
return 1;
并将其更改为
if (!kea.Handled)
return 1;
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