C 鍵盤鉤子

鍵盤鉤子是一種可以監控鍵盤操作的指令，我們去釣魚只要魚兒上鉤

不管它怎麼逃，只要掌控好鉤子上的繩子總是可以找到這條魚，鍵盤

鉤子是利用電腦一行行執行**特性，在目的視窗處理鍵**前攔截

把某個指令替換為另外一種指令，然後再把訊息傳送給目的視窗這樣

乙個週期下來，視窗程式會認為使用者輸入的就是現在的數值或者沒有 輸

入，不過鍵盤鉤子在某些不法分子手裡則成為了 盜號、監控密碼 等

違法操作。

原型：hhook setwindowshookex(int idhook, hookproc lpfn, hinstance hmod, dword dwthreadid);

// win32 keyboard hook.

public const int wh_keyboard_ll = 13;
public const int null = 0;
public delegate int hookproc(int code, int wparam, kbdllhookstruct lparam);
[dllimport("user32.dll", setlasterror = true)]
public static extern int setwindowshookex(int hooktype, hookproc lpfn, int hmod, int dwthreadid);
[dllimport("user32.dll", setlasterror = true)]
public extern static int callnexthookex(int handle, int code, int wparam, kbdllhookstruct lparam);
[structlayout(layoutkind.sequential)]
public class kbdllhookstruct
[flags]
public enum kbdllhookstruct : uint
public volatile int hhook;
protected override void onload(eventargs e)
protected int keyboardproc(int code, int wparam, kbdllhookstruct lparam)

setwindowshookex(wh_keyboard_ll, keyboardproc, null, null)

// win32 keyboard hook.

public const int wh_keyboard = 2;
public const int null = 0;
public delegate int hookproc(int code, int wparam, int lparam);
[dllimport("kernel32.dll", setlasterror = true)]
public static extern int getcurrentthreadid();
[dllimport("user32.dll", setlasterror = true)]
public static extern int setwindowshookex(int hooktype, hookproc lpfn, int hmod, int dwthreadid);
[dllimport("user32.dll", setlasterror = true)]
public extern static int callnexthookex(int handle, int code, int wparam, int lparam);
public volatile int hhook;
protected override void onload(eventargs e)

protected int keyboardqueue(int code, int wparam, int lparam)

setwindowshookex(wh_keyboard, keyboardproc, null, getcurrentthreadid());

protected int keyboardproc(int code, int wparam, int lparam)

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