VOID lpReserved)
{
//如果使用lpReserved参数则删除下面这行
UNREFERENCED_PARAMETER(lpReserved);
if (dwReason == DLL_PROCESS_ATTACH)
{
TRACE0("MOUSEHOOK.DLL Initializing!\n");
//扩展DLL仅初始化一次
if (!AfxInitExtensionModule(MousehookDLL, hInstance))
return 0;
new CDynLinkLibrary(MousehookDLL);
//把DLL加入动态MFC类库中
glhInstance=hInstance;
//插入保存DLL实例句柄
}
else if (dwReason == DLL_PROCESS_DETACH)
{
TRACE0("MOUSEHOOK.DLL Terminating!\n");
//终止这个链接库前调用它
AfxTermExtensionModule(MousehookDLL);
}
return 1;
}
(8)类Cmousehook的成员函数的具体实现:
Cmousehook::Cmousehook()
//类构造函数
{
}
Cmousehook::~Cmousehook()
//类析构函数
{
stophook();
}
BOOL Cmousehook::starthook(HWND hWnd)
//安装钩子并设定接收显示窗口句柄
{
BOOL bResult=FALSE;
glhHook=SetWindowsHookEx(WH_MOUSE,MouseProc,glhInstance,0);
if(glhHook!=NULL)
bResult=TRUE;
glhDisplayWnd=hWnd;
//设置显示目标窗口标题编辑框的句柄
return bResult;
}
BOOL Cmousehook::stophook()
//卸载钩子
{
BOOL bResult=FALSE;
if(glhHook)
{
bResult= UnhookWindowsHookEx(glhHook);
if(bResult)
{
glhPrevTarWnd=NULL;
glhDisplayWnd=NULL;//清变量
glhHook=NULL;
}
}
return bResult;
}
(9)钩子函数的实现:
LRESULT WINAPI MouseProc(int nCode,WPARAM wparam,LPARAM lparam)
{
LPMOUSEHOOKSTRUCT pMouseHook=(MOUSEHOOKSTRUCT FAR *) lparam;
if (nCode>=0)
{
HWND glhTargetWnd=pMouseHook->hwnd;
//取目标窗口句柄
HWND ParentWnd=glhTargetWnd;
while (ParentWnd !=NULL)
{
glhTargetWnd=ParentWnd;
ParentWnd=GetParent(glhTargetWnd);
//取应用程序主窗口句柄
}
if(glhTargetWnd!=glhPrevTarWnd)
{
char szCaption[100];
GetWindowText(glhTargetWnd,szCaption,100);
//取目标窗口标题
if(IsWindow(glhDisplayWnd))
SendMessage(glhDisplayWnd,WM_SETTEXT,0,(LPARAM)(LPCTSTR)szCaption);
glhPrevTarWnd=glhTargetWnd;
//保存目标窗口
}
}
return CallNextHookEx(glhHook,nCode,wparam,lparam);
//继续传递消息
}
(10)编译项目生成mousehook.dll。
2.创建钩子可执行程序
(1)用MFC的AppWizard(EXE)创建项目Mouse;
(2)选择“基于对话应用”并按下“完成”键;
(3)编辑对话框,删除其中原有的两个按钮,加入静态文本框和编辑框,用鼠标右键点击静态文本框,在弹出的菜单中选择“属性”,设置其标题为“鼠标所在的窗口标题”;
(4)在Mouse.h中加入对Mousehook.h的包含语句#Include"..\Mousehook\Mousehook.h";
(5)在CMouseDlg.h的CMouseDlg类定义中添加私有数据成员:
CMouseHook m_hook;//加入钩子类作为数据成员
(6)修改CmouseDlg::OnInitDialog()函数:
BOOL CMouseDlg::OnInitDialog()
{
CDialog::OnInitDialog();
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX <0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysM