高手请帮忙，关于HOOK.不能启动第二个钩子？？

[michael_yi]

我在DLL用CMouseHook和CMsgHook分别定义了一个鼠标钩子和一个全局钩子，可是在应用程序中，CMouseHook mousehook; mousehook.starthook; mousehook.stophook;(starthook与stophook中分别调用了setwindowshookex()与unhookwindowshookex() api);可是当我第二次使用mousehook.starthook或者使用msghook.starthook时，返回值为空（之前我已调用了stophook)。即不能建立第二个钩子，为什么！！！请各位大虾指教，这里有礼了。

[sxbyl]

应该不会吧？象WH_JOURNALPLAYBACK和WH_JOURNALRECORD这样的钩子在实际使用时肯定要多次建立的，所以你说的问题应该不会出现。贴出你的代码来看看

[michael_yi]

this is my code:
#pragma data_seg("mydata")
HHOOK glhMouseHook=NULL;
HHOOK glhMsgHook=NULL;
...

//鼠标钩子类启动钩子函数
BOOL CMouseHook::StartHook(HWND hWnd,short sCallerInfo)
{
//::MessageBox(NULL,"ENTER STARTHOOK","HOOKTEST",MB_OK);
BOOL bResult=FALSE;
glhMouseHook=SetWindowsHookEx(WH_MOUSE,MouseProc,glhInstance,0);
if(glhMouseHook!=NULL)
{
bResult=TRUE;
//::MessageBox(NULL,"SET HOOK SUCCESS","HOOKTEST",MB_OK);
}
//保存调用者窗口句柄，调用者是谁的信息
glhLogonInfoOperateWnd=hWnd;
glsMouseHookCallerInfo=sCallerInfo;
return bResult;
}

//鼠标钩子类释放钩子函数
BOOL CMouseHook::StopHook()
{
BOOL bResult=FALSE;
if(glhMouseHook)
{
bResult= UnhookWindowsHookEx(glhMouseHook);
if(bResult)
{
glhLogonInfoOperateWnd=NULL;//清变量
glhMouseHook=NULL;
}
}
return bResult;
}
...

if(!g_MouseHook.StartHook(m_pMainWnd->m_hWnd,1))
::MessageBox(NULL,"g_MouseHook.StartHook(,1) ERROR","TESTHOOK",MB_OK);
...
if(!g_MouseHook.StopHook())
::MessageBox(NULL,"g_MouseHook.StopHook() ERROR","TESTHOOK",MB_OK);
下面调用starthook时无效
if(!g_MouseHook.StartHook(m_pMainWnd->m_hWnd,1))
::MessageBox(NULL,"g_MouseHook.StartHook(,1) ERROR","TESTHOOK",MB_OK);

if(!g_MsgHook.StartHook(m_pMainWnd->m_hWnd))
::MessageBox(NULL,"g_MsgHook.StartHook ERROR","TESTHOOK",MB_OK);