CE 6 鼠标钩子(HOOK)

// MouseHook.h 

#ifdef MOUSEHOOK_EXPORTS
#define MOUSEHOOK_API __declspec(dllexport)
#else
#define MOUSEHOOK_API __declspec(dllimport)
#endif

extern "C" MOUSEHOOK_API void CALLBACK InstallMouseHook(void);
extern "C" MOUSEHOOK_API void CALLBACK UnMouseHook(void);

extern "C" MOUSEHOOK_API LRESULT CALLBACK MouseHookProc(int nCode, WPARAM wParam, LPARAM lParam);

// MouseHook.cpp 
// MouseHook.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"
#include "MouseHook.h"
#include <Pwinuser.h>

// 告诉编译器将变量放入它自己的数据共享节中
#pragma data_seg("MouseHookData")

HINSTANCE ghInst = NULL;
HHOOK ghMouseHook = NULL;

#pragma data_seg()

// 告诉编译器设置共享节的访问方式为：读，写，共享
#pragma comment(linker, "/SECTION:MouseHookData,RWS")

BOOL APIENTRY DllMain(HANDLE hModule,DWORD  ul_reason_for_call,LPVOID lpReserved)
{
  switch(ul_reason_for_call)
  {
  case DLL_PROCESS_ATTACH:
    ghInst = (HINSTANCE)hModule;
    break;
  case DLL_THREAD_ATTACH:
  case DLL_THREAD_DETACH:
  case DLL_PROCESS_DETACH:
    break;
  }
    return TRUE;
}

extern "C" MOUSEHOOK_API void InstallMouseHook(void)
{
  RETAILMSG(1,(L"[Mouse HOOK]Install HOOK: 0x%x\r\n",ghInst));
  if(ghInst)
  {
    ghMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProc, ghInst, 0);
    if(NULL == ghMouseHook)
    {
      RETAILMSG(1,(L"[Mouse HOOK]HOOK create failed: %d\r\n",GetLastError()));
    }
  }
}

extern "C" MOUSEHOOK_API void UnMouseHook(void)
{
  RETAILMSG(1,(L"[Mouse HOOK]Uninstall HOOK:0x%x\r\n",ghMouseHook));
  if(ghMouseHook)
  {
    UnhookWindowsHookEx(ghMouseHook);
    ghMouseHook = NULL;
  }

  ghInst = NULL;
}

/*
nCode
[输入参数] 说明 HOOK 过程如何处理此消息。如果 nCode 小于零, HOOK 过程必须将此消息直接传递给下一个 CallNextHookEx, 并从 CallNextHookEx 返回.
  本参数可以取以下的值：HC_ACTION
wParam 和 lParam 参数中包含鼠标消息的信息。
wParam
[输入参数] 鼠标消息标识. 本参数取如下值之一: WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MOUSEMOVE, WM_MOUSEWHEEL, WM_MOUSEHWHEEL, WM_RBUTTONDOWN, 或 WM_RBUTTONUP. 
lParam
[输入参数] 指定 MSLLHOOKSTRUCT 结构体. 其中包含坐标等信息。
*/
// CE6 的鼠标 HOOK 的响应速度很慢, 原因不明!
extern "C" MOUSEHOOK_API LRESULT MouseHookProc(int nCode, WPARAM wParam, LPARAM lParam)
{
  static POINT ptPre;

#if _DEBUG
   RETAILMSG(1,(L"[Mouse HOOK]Mouse Proc,nCode is: %d\r\n",nCode));
   RETAILMSG(1,(L"[Mouse HOOK]Mouse Proc,wParam is: %d\r\n",wParam));
#endif
  PMSLLHOOKSTRUCT pMouseHookStruct = (PMSLLHOOKSTRUCT)lParam;
#if _DEBUG
  RETAILMSG(1,(L"[Mouse HOOK]Mouse Proc,mouseData is: %d\r\n",pMouseHookStruct->mouseData));
  RETAILMSG(1,(L"[Mouse HOOK]Mouse Proc,dwExtraInfo is: %d\r\n",pMouseHookStruct->dwExtraInfo));
#endif

  if(HC_ACTION != nCode)
  {
    return CallNextHookEx(ghMouseHook, nCode, wParam, lParam);
  }

  if(ptPre.x != pMouseHookStruct->pt.x || ptPre.y != pMouseHookStruct->pt.y)
  {
#if _DEBUG
    RETAILMSG(1,(L"[Mouse HOOK]Mouse Proc,pt is: %d,%d(%d,%d)\r\n",pMouseHookStruct->pt.x,pMouseHookStruct->pt.y,ptPre.x,ptPre.y));
#endif
    ptPre = pMouseHookStruct->pt;

    // 若注释掉此句, 则不再响应鼠标操作
    return CallNextHookEx(ghMouseHook, nCode, wParam, lParam);  // 继续传递消息
  }

  return TRUE;
}

// 调用示例

// mouse hook test
typedef void (*pInstallMouseHook)(void);
typedef void (*pUnMouseHook)(void);
HINSTANCE ghMouseModule = NULL;
pInstallMouseHook  InMouseHook = NULL;
pUnMouseHook  UnMouseHook = NULL;

ghMouseModule = LoadLibrary(L"\\AppStore\\SystemInfo\\MouseHook.dll");
if(ghMouseModule)
{
  InMouseHook = (pInstallMouseHook)GetProcAddress(ghMouseModule,L"InstallMouseHook");
  UnMouseHook = (pUnMouseHook)GetProcAddress(ghMouseModule,L"UnMouseHook");
}
if(NULL != InMouseHook)
{
  InMouseHook();
}