关于API HOOK（OpenProcess)，根据网上文章改写

 以下是部分程序，在VC++6.0   Plat  SDK 2003 SP1下编译通过

#include
#include "APIHook.h"

extern CAPIHook g_OpenProcess;

// 自定义OpenProcess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OpenProcess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;
}