, F12 , "", Visual Studio " " .
, , F12. , , DEBUG, F12 .
, ; . "". , 10 (Thread.Sleep), "biting".
F12, "", F12 - , . (Vista x64) F12:
F12 http://img242.imageshack.us/img242/5189/f12threadsre9.png
, - "GoToSleep", .
.
:
using System;
using System.Diagnostics;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
namespace KeyboardHook
{
public sealed class SimpleKeyboardHook : IDisposable
{
public SimpleKeyboardHook(Action<Keys> handler)
{
if (null == handler) { throw new ArgumentNullException("handler"); }
this._handler = handler;
var t = new Thread(this.ListenerThread) { IsBackground = true, Name = "KeyboardListener" };
t.Start();
}
public void Dispose()
{
if (!this._disposed)
{
UnhookWindowsHookEx(this._id);
this._disposed = true;
GC.SuppressFinalize(this);
}
}
public static void BreakOnF12(Keys keys)
{
if (keys == Keys.F12)
{
Debugger.Break();
}
}
private void ListenerThread()
{
using (var currentProcess = Process.GetCurrentProcess())
using (var mainModule = currentProcess.MainModule)
{
if (null == mainModule) { throw new InvalidOperationException("Unable to determine main module for the current process"); }
this._id = SetWindowsHookEx(
WH_KEYBOARD_LL,
this.HookCallback,
GetModuleHandle(mainModule.ModuleName), 0);
}
Application.Run();
}
private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
{
var vkCode = Marshal.ReadInt32(lParam);
this._handler((Keys)vkCode);
}
return CallNextHookEx(this._id, nCode, wParam, lParam);
}
private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
[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);
private const int WH_KEYBOARD_LL = 13;
private const int WM_KEYDOWN = 0x0100;
private IntPtr _id;
private readonly Action<Keys> _handler;
private volatile bool _disposed;
}
static class Program
{
private static void GoToSleep(object sender, EventArgs args)
{
Thread.Sleep(10000);
}
[STAThread]
static void Main()
{
using (new SimpleKeyboardHook(SimpleKeyboardHook.BreakOnF12))
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
var form = new Form { Text = "Sleepy form", Size = new Size(160,80), Padding = new Padding(6) };
var btn = new Button { Dock = DockStyle.Fill, Text = "Sleep", Location = new Point(10, 10) };
btn.Click += GoToSleep;
form.Controls.Add(btn);
Application.Run(form);
}
}
}
}