鼠标钩子--- 悬浮窗口

MouseHook.dll

MouseHook.h

#pragma once



/*global*/

 extern DWORD g_dwThreadId;

 extern HINSTANCE g_Hinstance;

 extern HHOOK g_MouseHook;

 extern POINT g_ptOld;



/*define*/

#define WM_MOUSEMOVE_ALL WM_USER+1000



/*export*/

 extern "C" __declspec(dllexport) BOOL SetHook(DWORD dwThreadId);



 LRESULT CALLBACK MouseProc(

     __in  int nCode,

    __in  WPARAM wParam,

    __in  LPARAM lParam

    );

 

MouseHook.cpp

#include "stdafx.h"

#include "MouseHook.h"



#pragma data_seg("GlobalData") DWORD g_dwThreadId = 0; #pragma data_seg()

#pragma comment(linker, "/SECTION:GlobalData,RWS")

HINSTANCE g_Hinstance = NULL;

HHOOK g_MouseHook = NULL;

POINT g_ptOld;



BOOL SetHook(DWORD dwThreadId)

{

    if ( dwThreadId <= 0 )

        return FALSE;



    g_MouseHook = ::SetWindowsHookEx(WH_MOUSE, (HOOKPROC)MouseProc, g_Hinstance, 0);

    if ( NULL == g_MouseHook )

        return FALSE;

    

    g_dwThreadId = dwThreadId;

    return TRUE;

}



LRESULT CALLBACK MouseProc(

    __in  int nCode,

    __in  WPARAM wParam,

    __in  LPARAM lParam

    )

{

    LRESULT lResult = ::CallNextHookEx(g_MouseHook, nCode, wParam, lParam);

    if ( g_dwThreadId > 0 )

    {

        POINT pt;

        ::GetCursorPos(&pt);

        if ( pt.x != g_ptOld.x && pt.y != g_ptOld.y )

        {

            ::PostThreadMessage(g_dwThreadId, WM_MOUSEMOVE_ALL, 0, MAKELPARAM(pt.x, pt.y));

            g_ptOld.x = pt.x;

            g_ptOld.y = pt.y;

        }

    }

    return lResult;

}

 

dllmain.cpp

#include "stdafx.h"

#include "MouseHook.h"



BOOL APIENTRY DllMain( HMODULE hModule,

                       DWORD  ul_reason_for_call,

                       LPVOID lpReserved

                     )

{

    g_Hinstance = (HINSTANCE)hModule;

    g_ptOld.x = 0;

    g_ptOld.y = 0;



    return TRUE;

}

 

HangWnd

HangWnd.cpp(App)

BOOL CHangWndApp::InitInstance()

{

    // InitCommonControlsEx() is required on Windows XP if an application

    // manifest specifies use of ComCtl32.dll version 6 or later to enable

    // visual styles.  Otherwise, any window creation will fail.

    INITCOMMONCONTROLSEX InitCtrls;

    InitCtrls.dwSize = sizeof(InitCtrls);

    // Set this to include all the common control classes you want to use

    // in your application.

    InitCtrls.dwICC = ICC_WIN95_CLASSES;

    InitCommonControlsEx(&InitCtrls);



    CWinApp::InitInstance();





    AfxEnableControlContainer();





 HMODULE hModule = ::LoadLibrary(_T("../Debug/MouseHook.dll")); if ( NULL == hModule ) return FALSE; typedef BOOL (*SETHOOK)(DWORD dwThreadId); SETHOOK SetHook = (SETHOOK)::GetProcAddress(hModule, "SetHook"); if ( SetHook ) { DWORD dwThreadId = ::GetCurrentThreadId(); SetHook(dwThreadId); }



    CHangWndDlg dlg;

    m_pMainWnd = &dlg;

    INT_PTR nResponse = dlg.DoModal();



 ::FreeLibrary(hModule); hModule = NULL; // Since the dialog has been closed, return FALSE so that we exit the

    //  application, rather than start the application's message pump.

    return FALSE;

}

 

HangWndDlg.h

class CHangWndDlg : public CDialogEx

{

// Construction

public:

    CHangWndDlg(CWnd* pParent = NULL);    // standard constructor



private:

   BOOL m_bIsWindowVisible;

};

 

HangWndDlg.cpp

#define WM_MOUSEMOVE_ALL WM_USER+1000

CHangWndDlg::CHangWndDlg(CWnd* pParent /*=NULL*/)

    : CDialogEx(CHangWndDlg::IDD, pParent)

{

    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

    m_bIsWindowVisible = TRUE;

}



BOOL CHangWndDlg::PreTranslateMessage(MSG* pMsg)

{

    if ( pMsg->message == WM_MOUSEMOVE_ALL )

    {

        POINT pt;

        pt.x = LOWORD(pMsg->lParam);

        pt.y = HIWORD(pMsg->lParam);



        CRect rcWnd;

        GetWindowRect(&rcWnd);



        int nWidth = rcWnd.Width();

        int nHeight = rcWnd.Height();



        if ( rcWnd.left <= 20 )

        {

            if ( m_bIsWindowVisible )

            {

                BOOL bPtInRect = rcWnd.PtInRect(pt);

                if ( !bPtInRect )

                {

                    for ( int i = 0; i < nWidth; i++ )

                    {

                        SetWindowPos(&CWnd::wndNoTopMost, 0, rcWnd.top, nWidth-i, nHeight, SWP_SHOWWINDOW);

                    }

                    SetWindowPos(&CWnd::wndNoTopMost, 0, rcWnd.top, nWidth, nHeight, SWP_HIDEWINDOW);

                    m_bIsWindowVisible = FALSE;

                }

            }

        }



        if ( !m_bIsWindowVisible && pt.x < 10 )

        {

            for ( int i = 0; i < nWidth; i++ )

            {

                SetWindowPos(&CWnd::wndNoTopMost, 0, rcWnd.top, 0+i, nHeight, SWP_SHOWWINDOW);

            }

            m_bIsWindowVisible = TRUE;

        }

    }

    return CDialogEx::PreTranslateMessage(pMsg);

}