头文件编译时出问题了.高手帮忙,进来接分.

我就是想写一个小程序模拟键盘输入方向键的右,在实况足球,NBA live等游戏里面能用.这个钩子哪错了,帮忙看看啊?
最后一步需要一个外壳程序就搞定了.可是编译有问题.点激活后激活钩子,然后在游戏画面按k键即可,按锁闭按钮就撤销钩子.
首先是ActiveKey工程.MFC AppWizard(dll)
ActiveKey.h
#ifndef _KEYDLL_H
#define _KEYDLL_H

class AFX_EXT_CLASS CKeyHook: public CObject
{
public:
CKeyHook();
~CKeyHook();
HHOOK Start();
//安装钩子
BOOL Stop(); //卸载钩子
};
#endif

ActiveKey.cpp

#include "stdafx.h"
#include <afxdllx.h>
#include "ActiveKey.h"

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

//Shared data section
#pragma data_seg("sharedata")
HHOOK glhHook=NULL; //钩子句柄。
HINSTANCE glhInstance=NULL; //DLL实例句柄。
#pragma data_seg()

static AFX_EXTENSION_MODULE ActiveKeyDLL = { NULL, NULL };

//键盘钩子处理函数。
extern "C" LRESULT WINAPI KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam)
{
if( nCode > = 0 )
{
if( wParam == 'k' )//当按下k键时，激活。
{
//实现代码。
keybd_event(39,1,0,0);
Sleep(1000);
keybd_event(39,1,KEYEVENTF_KEYUP,0);
Sleep(500);
}
}
return CallNextHookEx(glhHook,nCode,wParam,lParam);
}

CKeyHook::CKeyHook(){}
CKeyHook::~CKeyHook()
{
if( glhHook )
Stop();
}
//安装全局钩子。
HHOOK CKeyHook::Start()
{
glhHook = SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,glhInstance,0);//设置键盘钩子。
return glhHook;
}
//卸载全局钩子。
BOOL CKeyHook::Stop()
{
BOOL bResult = TRUE;
if( glhHook )
bResult = UnhookWindowsHookEx(glhHook);//卸载键盘钩子。
return bResult;
}

extern "C" int APIENTRY
DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
//如果使用lpReserved参数则删除下面这行
UNREFERENCED_PARAMETER(lpReserved);

if (dwReason == DLL_PROCESS_ATTACH)
{
TRACE0("NOtePadHOOK.DLL Initializing!\n");
//扩展DLL仅初始化一次
if (!AfxInitExtensionModule(ActiveKeyDLL, hInstance))
return 0;
new CDynLinkLibrary(ActiveKeyDLL);
//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("NotePadHOOK.DLL Terminating!\n");
//终止这个链接库前调用它
AfxTermExtensionModule(ActiveKeyDLL);
}
return 1;
}

ActiveKey.def
; ActiveKey.def : Declares the module parameters for the DLL.

LIBRARY "ActiveKey"
DESCRIPTION 'ActiveKey Windows Dynamic Link Library'

EXPORTS
; Explicit exports can go here

SECTIONS
sharedata Read Write Shared

rebuild all后生成了.ActiveKey.dll和ActiveKey.lib两个玩意儿.我把他们放到Simulation工程里面了.
然后是Simulation工程.MFC AppWizard(exe)->dialog based.
给两个按钮"激活","锁闭"分别用classView加了两个click事件.一个是m_hook.Start();//激活全局钩子。另一个是m_hook.stop();//撤销全局钩子。
同时把ActiveKey.h复制到了Simulation文件夹.并在stdAfx.h中加入include "ActiveKey.h"
最后在project->settings->link里面设置了ActiveKey.lib,然后rebuild all.结果如下:
Deleting intermediate files and output files for project 'Simulation - Win32 Debug'.
--------------------Configuration: Simulation - Win32 Debug--------------------
Creating Type Library...
Processing D:\C\Simulation\Simulation.odl
Simulation.odl
Processing D:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\oaidl.idl
oaidl.idl
Processing D:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\objidl.idl
objidl.idl
Processing D:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\unknwn.idl
unknwn.idl
Processing D:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\wtypes.idl
wtypes.idl
Compiling resources...
Compiling...
StdAfx.cpp
d:\c\Simulation\activekey.h(4) : error C2079: 'CKeyHook' uses undefined class 'AFX_EXT_CLASS'
d:\c\Simulation\activekey.h(4) : error C2239: unexpected token ':' following declaration of 'CKeyHook'
d:\c\Simulation\activekey.h(4) : error C2059: syntax error : 'public'
Error executing cl.exe.

Simulation.exe - 3 error(s), 0 warning(s)

请问哪里错了呢?