在vs2010下抄写了vc++深入详解的hook代码,其中让按F2关闭对话框,可在小弟我这里为什么按f2没反应呢?

// InnerHookDlg.cpp : 实现文件
//

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

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

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

// 对话框数据
    enum { IDD = IDD_ABOUTBOX };

    protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

// 实现
protected:
    DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CInnerHookDlg 对话框




CInnerHookDlg::CInnerHookDlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(CInnerHookDlg::IDD, pParent)
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CInnerHookDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CInnerHookDlg, CDialogEx)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
END_MESSAGE_MAP()


// CInnerHookDlg 消息处理程序
HWND g_hWnd = NULL;
HHOOK g_hMouse = NULL;
LRESULT CALLBACK MouseProc(int code, WPARAM wParam, LPARAM lParam)
{
    return 1;
}
/***********************具体代码************************/
HHOOK g_hKeyboard = NULL;
LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam)
{
    //return 1;
//    if(VK_SPACE == wParam || VK_RETURN == wParam)
    //if(VK_F4 == wParam && lParam>>29&1)
    //    return 1;
    //else
    //    return CallNextHookEx(g_hKeyboard,code,wParam,lParam);
    if(VK_F2 == wParam)
    {
        ::SendMessage(g_hWnd,WM_CLOSE,0,0);
        UnhookWindowsHookEx(g_hKeyboard);
        UnhookWindowsHookEx(g_hMouse);
    }
    return 1;
}
/**********************************************************/
BOOL CInnerHookDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    // 将“关于...”菜单项添加到系统菜单中。

    // IDM_ABOUTBOX 必须在系统命令范围内。
    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);

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

    // 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
    //  执行此操作
    SetIcon(m_hIcon, TRUE);            // 设置大图标
    SetIcon(m_hIcon, FALSE);        // 设置小图标

    // TODO: 在此添加额外的初始化代码
/***********************具体代码************************/
        g_hWnd == m_hWnd;
    g_hMouse = SetWindowsHookEx(WH_MOUSE,MouseProc,NULL,GetCurrentThreadId());
    g_hKeyboard = SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,NULL,GetCurrentThreadId());
/******************************************************/
    
return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

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

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CInnerHookDlg::OnPaint()
{
    if (IsIconic())
    {
        CPaintDC dc(this); // 用于绘制的设备上下文

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

        // 使图标在工作区矩形中居中
        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;

        // 绘制图标
        dc.DrawIcon(x, y, m_hIcon);
    }
    else
    {
        CDialogEx::OnPaint();
    }
}

//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CInnerHookDlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}