用HOOK OpenProcess实现不能被终止的程序

以下是部分程序，在VC++6.0    Plat   SDK 2003 SP1下编译通过 #include <windows.h>
#include "APIHook.h" 
extern CAPIHook g_OpenProcess; 
// 自定义TerminateProcess函数
#pragma data_seg("YCIShared")
HHOOK g_hHook = NULL;
DWORD   dwCurrentProcessId=0;
#pragma data_seg() 
HANDLE   WINAPI Hook_OpenProcess(DWORD dwDesiredAccess, BOOL bInheritHandle,   DWORD dwProcessId)
{
     typedef HANDLE   (WINAPI *PFNTERMINATEPROCESS)(DWORD, BOOL,DWORD);


if(dwProcessId != dwCurrentProcessId)
{
    return ((PFNTERMINATEPROCESS)(PROC)g_OpenProcess)(dwDesiredAccess,bInheritHandle,dwProcessId);
}
return 0;
} 


// 挂钩TerminateProcess函数
CAPIHook g_OpenProcess("kernel32.dll", "OpenProcess", 
       (PROC)Hook_OpenProcess); 


/////////////////////////////////////////////////////////////////////////// 


static HMODULE ModuleFromAddress(PVOID pv) 
{
MEMORY_BASIC_INFORMATION mbi;
if(::VirtualQuery(pv, &mbi, sizeof(mbi)) != 0)
{
   return (HMODULE)mbi.AllocationBase;
}
else
{
   return NULL;
}
} 
static LRESULT WINAPI GetMsgProc(int code, WPARAM wParam, LPARAM lParam) 
{
return ::CallNextHookEx(g_hHook, code, wParam, lParam);
} 
BOOL WINAPI SetSysHook(BOOL bInstall, DWORD dwThreadId)
{
BOOL bOk;
     dwCurrentProcessId=dwThreadId;
if(bInstall) 
{
   g_hHook = ::SetWindowsHookEx(WH_GETMESSAGE, GetMsgProc, 
       ModuleFromAddress(GetMsgProc), 0);
   bOk = (g_hHook != NULL);
} 
else 
{
   bOk = ::UnhookWindowsHookEx(g_hHook);
   g_hHook = NULL;
}
return bOk;
}