c#启动热健

Question

using System;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Threading;using System.Windows.Forms;
namespace GlobalHookDemo  {

/// <summary>
/// This class allows you to tap keyboard and mouse and / or to detect their activity even when an 
/// application runes in background or does not have any user interface at all. This class raises 
/// common .NET events with KeyEventArgs and MouseEventArgs so you can easily retrive any information you need.
/// </summary>
/// <res>
///  created by - Georgi
///  created on - 22.05.2004 13:08:01
/// </res>
public class UserActivityHook : object {

/// <summary>
/// Default constructor - starts hooks automatically
/// </summary>
public UserActivityHook() {
Start();
}

~UserActivityHook() { 
Stop();
}  public event MouseEventHandler OnMouseActivity;
public event KeyEventHandler KeyDown;
public event KeyPressEventHandler KeyPress;
public event KeyEventHandler KeyUp; public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); static int hMouseHook = 0; //Declare mouse hook handle as int.
static int hKeyboardHook = 0; //Declare keyboard hook handle as int. //values from Winuser.h in Microsoft SDK.
public const int WH_MOUSE_LL  = 14; //mouse hook constant
public const int WH_KEYBOARD_LL = 13; //keyboard hook constant HookProc MouseHookProcedure; //Declare MouseHookProcedure as HookProc type.
HookProc KeyboardHookProcedure; //Declare KeyboardHookProcedure as HookProc type.

Answer 1

//Declare wrapper managed POINT class.
[StructLayout(LayoutKind.Sequential)]
public class POINT 
{
public int x;
public int y;
} //Declare wrapper managed MouseHookStruct class.
[StructLayout(LayoutKind.Sequential)]
public class MouseHookStruct 
{
public POINT pt;
public int hwnd;
public int wHitTestCode;
public int dwExtraInfo;
} //Declare wrapper managed KeyboardHookStruct class.
[StructLayout(LayoutKind.Sequential)]
public class KeyboardHookStruct
{
public int vkCode; //Specifies a virtual-key code. The code must be a value in the range 1 to 254. 
public int scanCode; // Specifies a hardware scan code for the key. 
public int flags;  // Specifies the extended-key flag, event-injected flag, context code, and transition-state flag.
public int time; // Specifies the time stamp for this message.
public int dwExtraInfo; // Specifies extra information associated with the message. 
}
//Import for SetWindowsHookEx function.
//Use this function to install a hook.
[DllImport("user32.dll",CharSet=CharSet.Auto,
CallingConvention=CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, 
IntPtr hInstance, int threadId); //Import for UnhookWindowsHookEx.
//Call this function to uninstall the hook.
[DllImport("user32.dll",CharSet=CharSet.Auto,
 CallingConvention=CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);

//Import for CallNextHookEx.
//Use this function to pass the hook information to next hook procedure in chain.
[DllImport("user32.dll",CharSet=CharSet.Auto,
 CallingConvention=CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode, 
Int32 wParam, IntPtr lParam);

Answer 2

public void Start()
{
// install Mouse hook 
if(hMouseHook == 0)
{
// Create an instance of HookProc.
MouseHookProcedure = new HookProc(MouseHookProc); hMouseHook = SetWindowsHookEx( WH_MOUSE_LL,
MouseHookProcedure, 
Marshal.GetHINSTANCE(
Assembly.GetExecutingAssembly().GetModules()[0]),
0); //If SetWindowsHookEx fails.
if(hMouseHook == 0 ) {
Stop();
throw new Exception("SetWindowsHookEx failed.");
}
}

// install Keyboard hook 
if(hKeyboardHook == 0)
{
KeyboardHookProcedure = new HookProc(KeyboardHookProc);
hKeyboardHook = SetWindowsHookEx( WH_KEYBOARD_LL,
KeyboardHookProcedure, 
Marshal.GetHINSTANCE(
Assembly.GetExecutingAssembly().GetModules()[0]),
0); //If SetWindowsHookEx fails.
if(hKeyboardHook == 0 ) {
Stop();
throw new Exception("SetWindowsHookEx ist failed.");
}
}
} public void Stop()
{
bool retMouse =true;
bool retKeyboard = true;
if(hMouseHook != 0)
{
retMouse = UnhookWindowsHookEx(hMouseHook);
hMouseHook = 0;
} 

if(hKeyboardHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
hKeyboardHook = 0;
} 

//If UnhookWindowsHookEx fails.
if (!(retMouse && retKeyboard)) throw new Exception("UnhookWindowsHookEx failed.");
}