使用時,只需實例化Hook類的一個實例,然後調用start()安裝鉤子,stop()拆除鉤子.
如 Hook hk = new Hook();
hk.start();
hk.stop();
//--------------全局鍵盤鉤子類Hook------------------
using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace SmartDeviceProject1
{
public class Hook
{
public delegate int HookKeyProc(int code, IntPtr wParam, IntPtr lParam);
private HookKeyProc hookKeyDeleg;
public Hook()
{ }
#region public methods
//安裝鉤子
public void Start()
{
if (hHookKey != 0)
{
//Unhook the previouse one
this.Stop();
}
hookKeyDeleg = new HookKeyProc(HookKeyProcedure);
hHookKey = SetWindowsHookEx(WH_KEYBOARD_LL, hookKeyDeleg, GetModuleHandle(null), 0);
if (hHookKey == 0)
{
throw new SystemException("Failed acquiring of the hook.");
}
}
//拆除鉤子
public void Stop()
{
UnhookWindowsHookEx(hHookKey);
}
#endregion
#region protected and private methods
private int HookKeyProcedure(int code, IntPtr wParam, IntPtr lParam)
{
KBDLLHOOKSTRUCT hookStruct = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(KBDLLHOOKSTRUCT));
if (code < 0)
return CallNextHookEx(hookKeyDeleg, code, wParam, lParam);
if (hookStruct.vkCode == 0x5B)
{
//如果捕捉到VK_LWIN按鍵
//......處理......
return -1; //返回-1表示已經處理了，不再往下傳遞
}
if (hookStruct.vkCode == 0x25)
{
//如果捕捉到VK_LEFT按鍵
//......處理......
return -1;
}
// 沒處理的鍵的消息往下傳遞
return CallNextHookEx(hookKeyDeleg, code, wParam, lParam);
}
#endregion
#region P/Invoke declarations
[DllImport("coredll.dll")]
private static extern int SetWindowsHookEx(int type, HookKeyProc HookKeyProc, IntPtr hInstance, int m);
//private static extern int SetWindowsHookEx(int type, HookMouseProc HookMouseProc, IntPtr hInstance, int m);
[DllImport("coredll.dll")]
private static extern IntPtr GetModuleHandle(string mod);
[DllImport("coredll.dll")]
private static extern int CallNextHookEx(
HookKeyProc hhk,
int nCode,
IntPtr wParam,
IntPtr lParam
);
[DllImport("coredll.dll")]
private static extern int GetCurrentThreadId();
[DllImport("coredll.dll", SetLastError = true)]
private static extern int UnhookWindowsHookEx(int idHook);
private struct KBDLLHOOKSTRUCT
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public IntPtr dwExtraInfo;
}
const int WH_KEYBOARD_LL = 20;
public class KeyBoardInfo
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
}
#endregion
}
}