Hook编程1:进程内勾子

// InnerHookDlg.cpp : implementation file
//

#include "stdafx.h"
#include "InnerHook.h"
#include "InnerHookDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CInnerHookDlg dialog

CInnerHookDlg::CInnerHookDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CInnerHookDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CInnerHookDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CInnerHookDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CInnerHookDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CInnerHookDlg, CDialog)
	//{{AFX_MSG_MAP(CInnerHookDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_CHAR()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CInnerHookDlg message handlers

HHOOK g_hMouseHook;
HHOOK g_hKeyHook;
HHOOK g_hKeyHook2;
HWND g_hWnd;
LRESULT CALLBACK MouseProc(
						   int nCode,      // hook code
						   WPARAM wParam,  // message identifier
						   LPARAM lParam   // mouse coordinates
						   )
{
	return 1;
}

LRESULT CALLBACK KeyboardProc2(
							  int code,       // hook code
							  WPARAM wParam,  // virtual-key code
							  LPARAM lParam   // keystroke-message information
							  )
{
	if(VK_F2 == wParam)
	{
		AfxMessageBox("安下了f2");
		return 1;
	}
	else CallNextHookEx(g_hKeyHook2,code,wParam,lParam);
}
LRESULT CALLBACK KeyboardProc(
							  int code,       // hook code
							  WPARAM wParam,  // virtual-key code
							  LPARAM lParam   // keystroke-message information
							  )
{
	if(wParam == VK_SPACE){
		TRACE("空格被阻止\n");
		//AfxMessageBox("Key Down");
		return 1;
	}
	else if(wParam == VK_F4 && lParam>>29 & 1)
	{
		TRACE("alt + f4 pressed");
		return 1;
	}
	else if(wParam == VK_F2)
	{
		::SendMessage(g_hWnd,WM_CLOSE,0,0);
		UnhookWindowsHookEx(g_hKeyHook);
		UnhookWindowsHookEx(g_hKeyHook2);
		return 1;
	}
	else
	{
		TRACE("没有阻止\n");
		return CallNextHookEx(g_hKeyHook,code,wParam,lParam);
	}
}

BOOL CInnerHookDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	//g_hMouseHook = SetWindowsHookEx(WH_MOUSE,MouseProc,NULL,GetCurrentThreadId());
	g_hWnd = this->m_hWnd;
	
	g_hKeyHook= SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,NULL,GetCurrentThreadId());
	g_hKeyHook2 = SetWindowsHookEx(WH_KEYBOARD,KeyboardProc2,NULL,GetCurrentThreadId());
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CInnerHookDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CInnerHookDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CInnerHookDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CInnerHookDlg::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default
	CString str;
	str.Format("char:%c,code:%d",nChar,nChar);
	MessageBox(str);
	CDialog::OnChar(nChar, nRepCnt, nFlags);
}