// HookDllDemo.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include <afxdllx.h>

?

#include <windows.h> //引入windows頭文件

?

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

?

// 建立數據段
#pragma data_seg("HookData")
HHOOK g_hHook = NULL;?? // 鉤子句柄
HINSTANCE g_hInstDLL = NULL; // 模塊句柄
#pragma data_seg()
//設置數據段為可讀可寫可共享
#pragma comment(linker,"/SECTION:HookData,RWS")

?

static AFX_EXTENSION_MODULE HookDllDemoDLL = { NULL, NULL };

extern "C" int APIENTRY
DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)//入口函數
{
?// Remove this if you use lpReserved
?UNREFERENCED_PARAMETER(lpReserved);

?if (dwReason == DLL_PROCESS_ATTACH)
?{
??TRACE0("HOOKDLLDEMO.DLL Initializing!/n");
??
??// Extension DLL one-time initialization
??if (!AfxInitExtensionModule(HookDllDemoDLL, hInstance))
???return 0;

??// Insert this DLL into the resource chain
??// NOTE: If this Extension DLL is being implicitly linked to by
??//? an MFC Regular DLL (such as an ActiveX Control)
??//? instead of an MFC application, then you will want to
??//? remove this line from DllMain and put it in a separate
??//? function exported from this Extension DLL.? The Regular DLL
??//? that uses this Extension DLL should then explicitly call that
??//? function to initialize this Extension DLL.? Otherwise,
??//? the CDynLinkLibrary object will not be attached to the
??//? Regular DLL's resource chain, and serious problems will
??//? result.

??new CDynLinkLibrary(HookDllDemoDLL);

?

??g_hInstDLL = hInstDLL; // 初始化模塊句柄

?}
?else if (dwReason == DLL_PROCESS_DETACH)
?{
??TRACE0("HOOKDLLDEMO.DLL Terminating!/n");
??// Terminate the library before destructors are called
??AfxTermExtensionModule(HookDllDemoDLL);
?}
?return 1;?? // ok
}

?

?

// 鉤子回調函數
LRESULT WINAPI HookProc(int nCode, WPARAM wParam, LPARAM lParam)
{
?// TODO: 在這里添加響應動作
?
?// 將事件傳遞到下一個鉤子
?return CallNextHookEx(g_hHook, nCode, wParam, lParam);
}

// 安裝鉤子
extern "C" __declspec(dllexport) DWORD InstallHook(void)
{
?DWORD dwRet = 0;
?/*加載鉤子類別*/
?g_hHook = SetWindowsHookEx(WH_MOUSE/*WH_SHELL*/, HookProc, g_hInstDLL, 0);?
?if(g_hHook == NULL)
??dwRet = GetLastError();
?return dwRet;
}

// 卸載鉤子
extern "C" __declspec(dllexport) DWORD KillHook(void)
{
?if(UnhookWindowsHookEx(g_hHook))
??return 0;
?else
??return GetLastError();
}

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