DLL原代码：
#include "windows.h"
HHOOK jhgouzi=NULL;
_declspec(dllexport) void setjhhook();
//定义接收键盘消息引发的操作
LRESULT CALLBACK keyboardproc(
  int code, //hook code
  WPARAM wparam, //virtual key code
  LPARAM lparam //keystroke message info   
  )
{
if(((DWORD)lparam&0x40000000) && (HC_ACTION==code))
{
switch(wparam)
{
case VK_TAB:MessageBox(NULL,"tab","提示",0);break;
case VK_NUMPAD0:MessageBox(NULL,"0","提示",0);break;
case VK_NUMPAD1:MessageBox(NULL,"1","提示",0);break;
case VK_NUMPAD2:MessageBox(NULL,"2","提示",0); break;
case VK_NUMPAD3:MessageBox(NULL,"3","提示",0); break;
case VK_NUMPAD4:MessageBox(NULL,"4","提示",0); break;
case VK_NUMPAD5:MessageBox(NULL,"5","提示",0); break;
case VK_NUMPAD6:MessageBox(NULL,"6","提示",0); break;
case VK_NUMPAD7:MessageBox(NULL,"7","提示",0); break;
case VK_NUMPAD8:MessageBox(NULL,"8","提示",0); break;
case VK_NUMPAD9:MessageBox(NULL,"9","提示",0); break;
}
return CallNextHookEx(jhgouzi,code,wparam,lparam);
}
}

_declspec(dllexport) void setjhhook()
{
jhgouzi=SetWindowsHookEx(WH_KEYBOARD,keyboardproc,GetModuleHandle("hook"),0);

}

exe原代码，EXE是VC最简单的对话筐程序，只在BOOL CJhDlg::OnInitDialog()进程中设置HOOK
见黑体部分

// jhDlg.cpp : implementation file
//

#include "stdafx.h"
#include "jh.h"
#include "jhDlg.h"

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

_declspec(dllimport) void setjhhook(); //wbs

/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CJhDlg dialog

CJhDlg::CJhDlg(CWnd* pParent /*=NULL*/)
: CDialog(CJhDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CJhDlg)
// 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 CJhDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CJhDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}

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

/////////////////////////////////////////////////////////////////////////////
// CJhDlg message handlers

BOOL CJhDlg::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
setjhhook();    //wbs 设置HOOK
return TRUE;  // return TRUE  unless you set the focus to a control
}

void CJhDlg::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 CJhDlg::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 CJhDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

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