<span role="heading" aria-level="2">利用两个dll实现全局钩子

大家好，又见面了，我是你们的朋友全栈君。

全局消息钩子的钩子函数一定要再dll中，然后启动安装钩子不能在dll中，要是我想在程序开始时安装钩子怎么办。很简单利用两个钩子就行了，只要安装钩子和钩子函数不在同一个dll就行了。

下面请看案例（编译

编译环境: vs2010 多字节　　已在window7 32位测试通过

）

//mouseHook.cpp 钩子函数所在dll
#include <windows.h>

// a sample exported function
#define DEF_PROCESS_NAME "winmine.exe"
#define WIDTH 32
#define HEIGHT 24

HINSTANCE g_hInstance=NULL;
HHOOK g_hHook=NULL;


//窗口坐标转化为雷区坐标
VOID windowPosChangeToMinePos(POINT * pt){
    int y = (pt->x-10)/16+1;
    int x = (pt->y-55)/16+1;
    pt->x = x;
    pt->y = y;
}

BOOL first = TRUE;

BYTE rects[HEIGHT][WIDTH];
HWND window = NULL;
// a sample exported function
//LRESULT是一个数据类型，指的是从窗口程序或者回调函数返回的32位值
//lParam wParam 是宏定义，一般在消息函数中带着两个类型的参数，通常用来存储窗口消息的参数。wParam用来存储小段消息，如标志。lParam 通常用于存储消息所需的对象。
LRESULT CALLBACK MouseProc(int nCode,WPARAM wParam,LPARAM lParam)
{
    char szPath[MAX_PATH]={0,};
    char *p=NULL;
    HWND hWnd;
    int x;
    int y;
    char  xs[MAX_PATH] = {0,};
    char  ys[MAX_PATH] = {0,};
    int i,j;
    byte * temp;
    int tempInt;
    char  byteTemp[2] = {0,};
    if (nCode>=0)
    {
        //0=key press,1=key release
        if (wParam == WM_MOUSEMOVE )//释放键盘按键时
        {
            GetModuleFileNameA(NULL,szPath,MAX_PATH);
            p=strrchr(szPath,'\\');//查找字符在指定字符串中从左面开始的最后一次出现的位置
            
            //比较当前进程名称，若为notepad.exe,则消息不会传递给应用程序（或下一个“钩子”）
            if (!_stricmp(p+1,DEF_PROCESS_NAME)){
                //SetWindowTextA(hWnd,"saolei");
                LPMOUSEHOOKSTRUCT lpMouse=(MOUSEHOOKSTRUCT FAR*)lParam;
                if (first==TRUE)

                {    
                    window = lpMouse->hwnd;
                    first=FALSE;
                }
            
                
                ScreenToClient(lpMouse->hwnd,&lpMouse->pt);
                windowPosChangeToMinePos(&lpMouse->pt);
                x = lpMouse->pt.x;
                y =lpMouse->pt.y;
                if(x>0&&y>0&&window==lpMouse->hwnd){
                    temp= (byte *)0x01005361;
                    for (i=0;i<HEIGHT;i++)
                    {
                        for (j=0;j<WIDTH;j++)
                        {    
                            rects[i][j] = *(temp+i*WIDTH+j);
                        }
                    }
                 tempInt =  rects[x-1][y-1];
                //itoa(tempInt,xs,16);
                /* itoa(x,xs,16);
                itoa(y,ys,10);
                strcat(xs,",");
                strcat(xs,ys);*/
                /*    strcat(xs,",");
                itoa(x,ys,10);
                strcat(xs,ys);
                strcat(xs,",");
                itoa(y,ys,10);
                strcat(xs,ys);*/
                /* itoa((int)lpMouse->hwnd,xs,16);
                 SetWindowTextA(lpMouse->hwnd,xs);*/
                 if (tempInt==0x8f)
                 {
                 SetWindowTextA(lpMouse->hwnd,"扫雷");
                 }
                 else
                 SetWindowTextA(lpMouse->hwnd,"扫蕾");
                
                }
                
                }
        }

    }

    //若非notepad.exe，则调用CallNextHookEx()函数，将消息传递给应用程序(或下一个“钩子”)。
    return CallNextHookEx(g_hHook,nCode,wParam,lParam);

}
LPDWORD lpdwProcessId;
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
    switch (fdwReason)
    {
    case DLL_PROCESS_ATTACH:
        g_hInstance = hinstDLL;
        break;

    case DLL_PROCESS_DETACH:
        break;

    case DLL_THREAD_ATTACH:
    
        // attach to thread
        break;

    case DLL_THREAD_DETACH:

        // detach from thread
        break;
    }
    return TRUE; // succesful
}

#ifdef __cplusplus
extern "C"
{
#endif


    __declspec(dllexport) void HookStart()
    {
        //钩子类型、回调函数地址、实例句柄、线程ID
        g_hHook=SetWindowsHookEx(WH_MOUSE,MouseProc,g_hInstance,0);
    }

    __declspec(dllexport) void HookStop()
    {
        if(g_hHook)
        {
            UnhookWindowsHookEx(g_hHook);
            g_hHook=NULL;
        }
    }

#ifdef __cplusplus
}
#endif

//middleObject.cpp  生成dll 在dll被加载启动安装钩子
#include <windows.h>
#include <stdio.h>
#include <conio.h>

#define DEF_DLL_NAME "mouseHook.dll"
#define DEF_HOOKSTART "HookStart"
#define DEF_HOOKSTOP "HookStop"

typedef void (*PFN_HOOKSTART)();
typedef void (*PFN_HOOKSTOP)();
HMODULE hDll=NULL;
PFN_HOOKSTART HookStart=NULL;
PFN_HOOKSTOP HookStop=NULL;

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
    switch (fdwReason)
    {
    case DLL_PROCESS_ATTACH:

    

        //加载KeyHook.dll
        hDll=LoadLibraryA(DEF_DLL_NAME);

        //获取导出函数地址
        HookStart=(PFN_HOOKSTART)GetProcAddress(hDll,DEF_HOOKSTART);
    

        //开始钩取
        HookStart();

        break;

    case DLL_PROCESS_DETACH:
        HookStop=(PFN_HOOKSTART)GetProcAddress(hDll,DEF_HOOKSTOP);
        HookStop();
        // detach from process
        break;

    case DLL_THREAD_ATTACH:

        // attach to thread
        break;

    case DLL_THREAD_DETACH:

        // detach from thread
        break;
    }
    return TRUE; // succesful
}
#ifdef __cplusplus
extern "C"
{
#endif

    __declspec(dllexport) void dummy()
    {
        
    }


#ifdef __cplusplus
}
#endif