描述:
这是在msdn上copy的一段关于windows firewall的代码 在xp sp2的platform SDK环境编译
源码如下：
/*
Copyright (c) Microsoft Corporation
SYNOPSIS
Sample code for the Windows Firewall COM interface.
*/
#include <windows.h>
#include <crtdbg.h>
#include <objbase.h>
#include <netfw.h>
#include <oleauto.h>
#include <stdio.h>
HRESULT WindowsFirewallInitialize(OUT INetFwProfile** fwProfile)
{
HRESULT hr = S_OK;
INetFwMgr* fwMgr = NULL;
INetFwPolicy* fwPolicy = NULL;
_ASSERT(fwProfile != NULL);
*fwProfile = NULL;
// Create an instance of the firewall settings manager.
hr = CoCreateInstance(
__uuidof(NetFwMgr),
NULL,
CLSCTX_INPROC_SERVER,
__uuidof(INetFwMgr),
(void**)&fwMgr
);
if (FAILED(hr))
{
printf("CoCreateInstance failed: 0x%08lx\n", hr);
goto error;
}
// Retrieve the local firewall policy.
hr = fwMgr->get_LocalPolicy(&fwPolicy);
if (FAILED(hr))
{
printf("get_LocalPolicy failed: 0x%08lx\n", hr);
goto error;
}
// Retrieve the firewall profile currently in effect.
hr = fwPolicy->get_CurrentProfile(fwProfile);
if (FAILED(hr))
{
printf("get_CurrentProfile failed: 0x%08lx\n", hr);
goto error;
}
error:
// Release the local firewall policy.
if (fwPolicy != NULL)
{
fwPolicy->Release();
}
// Release the firewall settings manager.
if (fwMgr != NULL)
{
fwMgr->Release();
}
return hr;
}
void WindowsFirewallCleanup(IN INetFwProfile* fwProfile)
{
// Release the firewall profile.
if (fwProfile != NULL)
{
fwProfile->Release();
}
}
HRESULT WindowsFirewallIsOn(IN INetFwProfile* fwProfile, OUT BOOL* fwOn)
{
HRESULT hr = S_OK;
VARIANT_BOOL fwEnabled;
_ASSERT(fwProfile != NULL);
_ASSERT(fwOn != NULL);
*fwOn = FALSE;
// Get the current state of the firewall.
hr = fwProfile->get_FirewallEnabled(&fwEnabled);
if (FAILED(hr))
{
printf("get_FirewallEnabled failed: 0x%08lx\n", hr);
goto error;
}
// Check to see if the firewall is on.
if (fwEnabled != VARIANT_FALSE)
{
*fwOn = TRUE;
printf("The firewall is on.\n");
}
else
{
printf("The firewall is off.\n");
}
error:
return hr;
}
解决方案1:
看看objbase头文件里面的CoInitializeEx的定义就清楚了,你必须定义#define _WIN32_WiNNT或者_WIN32_DCOM才行.
解决方案2: 在#include<windows.h>之前加上：
#define _WIN32_DCOM
或
#define _WIN32_WINNT 0x0400 // 0x0400以上都可以