我想在按下 CTRL + A + A
时进行拦截我读了这篇文章 How can I register a global hot key to say CTRL+SHIFT+(LETTER) using WPF and .NET 3.5?
无论如何，我试图更改添加了代码和“＆”的代码，但这和其他尝试都是错误的。
如果按 CTRL + A + A 怎么办？
感谢您的帮助！
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace GlobalHotkeyExampleForm
{
public partial class Form1 : Form
{
private void Form1_Load(object sender, EventArgs e)
{
}
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
enum KeyModifier
{
None = 0,
Alt = 1,
Control = 2,
Shift = 4,
WinKey = 8
}
public Form1()
{
InitializeComponent();
int id = 0; // The id of the hotkey.
RegisterHotKey(this.Handle, id, (int)KeyModifier.Control, Keys.A.GetHashCode()); // Register ctrl + a as global hotkey.
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == 0x0312)
{
/* Note that the three lines below are not needed if you only want to register one hotkey.
* The below lines are useful in case you want to register multiple keys, which you can use a switch with the id as argument, or if you want to know which key/modifier was pressed for some particular reason. */
Keys key = (Keys)(((int)m.LParam >> 16) & 0xFFFF); // The key of the hotkey that was pressed.
KeyModifier modifier = (KeyModifier)((int)m.LParam & 0xFFFF); // The modifier of the hotkey that was pressed.
int id = m.WParam.ToInt32(); // The id of the hotkey that was pressed.
MessageBox.Show("Hotkey has been pressed!");
// do something
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
UnregisterHotKey(this.Handle, 0); // Unregister hotkey with id 0 before closing the form. You might want to call this more than once with different id values if you are planning to register more than one hotkey.
}
private void button1_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
答案 0 :(得分：0)
昨天我回到了这个问题，最后，我做了我想做的事情，但是改变了策略，因为使用上层代码，我并没有真正找到目标的解决方案。我将报告为什么我认为它对其他人可能有用，也许有人有不同的解决方案。
因此，在上面的代码中，我尝试拦截CTRL + C + C，然后在Windows Clipboard上获取使用副本。但是，这里的问题是代码registers the shortkey，因此任何其他软件都无法继续使用CTRL + C。我尝试to unregister the shortkey后才缓存已按下CTRL + C，但仅发现了问题。无论如何，我不喜欢“偷”另一个应用程序的快捷键，我更喜欢在按下它们时“监听”键。
因此，它在代码后加上一些注释（我将粘贴发现的“听按键”并添加新答案的解决方案）。
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Text;
namespace GlobalHotkeyExampleForm
{
public partial class Form1 : Form
{
private void Form1_Load(object sender, EventArgs e)
{
}
public int shortkey = 0;
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
enum KeyModifier
{
None = 0,
Alt = 1,
Control = 2,
Shift = 4,
WinKey = 8
}
public Form1()
{
InitializeComponent();
int id = 0; // The id of the hotkey.
RegisterHotKey(this.Handle, id, (int)KeyModifier.Control, Keys.C.GetHashCode()); // Register CTRL + C as global hotkey.
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == 0x0312)
{
/* Note that the three lines below are not needed if you only want to register one hotkey.
* The below lines are useful in case you want to register multiple keys, which you can use a switch with the id as argument, or if you want to know which key/modifier was pressed for some particular reason. */
Keys key = (Keys)(((int)m.LParam >> 16) & 0xFFFF); // The key of the hotkey that was pressed.
KeyModifier modifier = (KeyModifier)((int)m.LParam & 0xFFFF); // The modifier of the hotkey that was pressed.
int id = m.WParam.ToInt32(); // The id of the hotkey that was pressed.
if (modifier == KeyModifier.Control && key == Keys.C)
{
shortkey = shortkey + 1;
label1.Text = (shortkey.ToString());
//if I enebale this code it works partially. The UnregisterHotKey and RegisterHotKey works perfectly and alone also SendKeys works prefectly, but together it doesn't:
//it doesn't recognize that CTRL is still pressed and I don't want to do CTRL C + CTRL C and I don't like "to stole" the shortkey from other apps!;
//I tried to use SendKeys to resend CTRL C or onlt CTRL but it doens't work and it creates only Register problems
//UnregisterHotKey(this.Handle, 0); //unregister the hotkey catching
//SendKeys.Send("^c"); //send key to active application (it doesn't matter if this is the application)
////register the hotkey catching as C only
//RegisterHotKey(this.Handle, id, (int)KeyModifier.Control, Keys.C.GetHashCode());
//SendKeys.Send("^c");
//SendKeys.Send("^");
timer1.Start();
}
//MessageBox.Show("Hotkey has been pressed!");
// do something
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
UnregisterHotKey(this.Handle, 0); // Unregister hotkey with id 0 before closing the form. You might want to call this more than once with different id values if you are planning to register more than one hotkey.
}
private void button1_Click(object sender, EventArgs e)
{
this.Close();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (shortkey == 2)
{
string returnMyText = Clipboard.GetText(TextDataFormat.Text);
}
shortkey = 0;
timer1.Stop();
}
}
}
答案 1 :(得分：0)
这是我发现要聆听按键压力的解决方案。 我从“ Dylan网站”上获取了代码，然后进行了一些更改： https://www.dylansweb.com/2014/10/low-level-global-keyboard-hook-sink-in-c-net/
这是另外两行的课程：
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Input;
namespace DesktopWPFAppLowLevelKeyboardHook
{
public class LowLevelKeyboardListener
{
private const int WH_KEYBOARD_LL = 13;
private const int WM_KEYDOWN = 0x0100;
private const int WM_KEYUP = 0x101;
private const int WM_SYSKEYDOWN = 0x104;
private const int WM_SYSKEYUP = 0x105;
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr GetModuleHandle(string lpModuleName);
public delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
public event EventHandler<KeyPressedArgs> OnKeyPressed;
private LowLevelKeyboardProc _proc;
private IntPtr _hookID = IntPtr.Zero;
public LowLevelKeyboardListener()
{
_proc = HookCallback;
}
public void HookKeyboard()
{
_hookID = SetHook(_proc);
}
public void UnHookKeyboard()
{
UnhookWindowsHookEx(_hookID);
}
private IntPtr SetHook(LowLevelKeyboardProc proc)
{
using (Process curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
{
return SetWindowsHookEx(WH_KEYBOARD_LL, proc, GetModuleHandle(curModule.ModuleName), 0);
}
}
private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN || wParam == (IntPtr)WM_SYSKEYDOWN)
{
int vkCode = Marshal.ReadInt32(lParam);
int status = 1;
if (OnKeyPressed != null) { OnKeyPressed(this, new KeyPressedArgs(KeyInterop.KeyFromVirtualKey(vkCode), status)); }
}
else if (nCode >= 0 && wParam == (IntPtr)WM_KEYUP || wParam == (IntPtr)WM_SYSKEYUP)
{
int vkCode = Marshal.ReadInt32(lParam);
int status = 0;
if (OnKeyPressed != null) { OnKeyPressed(this, new KeyPressedArgs(KeyInterop.KeyFromVirtualKey(vkCode), status)); }
}
return CallNextHookEx(_hookID, nCode, wParam, lParam);
}
}
public class KeyPressedArgs : EventArgs
{
public Key KeyPressed { get; private set; }
public int KeyStatus { get; private set; }
public KeyPressedArgs(Key key, int status)
{
KeyPressed = key;
KeyStatus = status;
}
}
}
这是表格：
using DesktopWPFAppLowLevelKeyboardHook;
using System;
using System.Windows.Forms;
namespace AppLowLevelKeyboardHook
{
public partial class Form1 : Form
{
private LowLevelKeyboardListener _listener;
public int ctrlStatus;
public int cStatus;
public Form1()
{
InitializeComponent();
}
private void Window_Loaded(object sender, EventArgs e)
{
_listener = new LowLevelKeyboardListener();
_listener.OnKeyPressed += _listener_OnKeyPressed;
_listener.HookKeyboard();
}
private void _listener_OnKeyPressed(object sender, KeyPressedArgs e)
{
this.textBox_DisplayKeyboardInput.Text += e.KeyPressed.ToString() + e.KeyStatus.ToString();
if (e.KeyStatus == 1 && (e.KeyPressed.ToString() == "LeftCtrl" || e.KeyStatus.ToString() == "RightCtrl"))
{
if (ctrlStatus == 0)
{
ctrlStatus = ctrlStatus + 1;
timer1.Start();
}
}
else if (e.KeyStatus == 1 && e.KeyPressed.ToString() == "C")
{
if (ctrlStatus == 1 && (cStatus == 0 || cStatus == 2))
{
cStatus = cStatus + 1;
}
}
//no need to wait that CTRL will be released
//else if (e.KeyStatus == 0 && (e.KeyPressed.ToString() == "LeftCtrl" || e.KeyStatus.ToString() == "RightCtrl"))
//{
// if (ctrlStatus == 1)
// {
// ctrlStatus = ctrlStatus + 1;
// }
//}
else if (e.KeyStatus == 0 && e.KeyPressed.ToString() == "C")
{
if (ctrlStatus == 1)
{
if (cStatus == 1 || cStatus == 3)
{
cStatus = cStatus + 1;
}
}
}
}
private void timer1_Tick(object sender, EventArgs e)
{
if ((ctrlStatus == 1) && cStatus == 3 || cStatus == 4) //no need to wait that CTRL will be released (ctrlStatus == 2)
{
//do something
label1.Text = "";
label1.Refresh();
label1.Text = Clipboard.GetText(TextDataFormat.UnicodeText);
//\do something
}
ctrlStatus = 0;
cStatus = 0;
timer1.Stop();
}
private void Window_Closing(object sender, FormClosingEventArgs e)
{
_listener.UnHookKeyboard();
}
}
}
PS：最初它是WPF应用程序，但是我的它是WFA，不包含KeyInterop。
所以我只是将参考程序集添加到WindowsBase.dll