C++ 获取局域网内所有可用IP和主机名

void GetNameAndIp()
{

	struct   hostent   *host;
	struct   in_addr   *ptr;

	DWORD   dwScope = RESOURCE_CONTEXT;
	NETRESOURCE   *NetResource = NULL;
	HANDLE   hEnum;
	WNetOpenEnum(dwScope, NULL, NULL, NULL, &hEnum);

	WSADATA   wsaData;
	WSAStartup(MAKEWORD(1, 1), &wsaData);

	if (hEnum)
	{
		DWORD   Count = 0xFFFFFFFF;
		DWORD   BufferSize = 10240;
		LPVOID   Buffer = new char[10240];
		WNetEnumResource(hEnum, &Count, Buffer, &BufferSize);
		NetResource = (NETRESOURCE*)Buffer;

		char szHostName[200];

		for (unsigned int i = 0; i < BufferSize / sizeof(NETRESOURCE); i++, NetResource++)
		{
			if (NetResource->dwUsage == RESOURCEUSAGE_CONTAINER && NetResource->dwType == RESOURCETYPE_ANY)
			{
				if (NetResource->lpRemoteName)
				{
					CString   strFullName = NetResource->lpRemoteName;
					if (0 == strFullName.Left(2).Compare(_T("\\\\")))
						strFullName = strFullName.Right(strFullName.GetLength() - 2);

					gethostname(szHostName, strlen(szHostName));
					USES_CONVERSION;
					char *pchar = T2A(strFullName);
					host = gethostbyname(pchar);

					if (host == NULL)   continue;
					ptr = (struct in_addr *)   host->h_addr_list[0];

					string str = "";
					for (int n = 0; n<4; n++)
					{
						CString addr;
						if (n > 0)
						{
							str += ".";
						}
						int value = (unsigned int)((unsigned char*)host->h_addr_list[0])[n];
						char p[20];
						sprintf(p, "%d", value);
						str.append(p);
					}

					std::cout <<"IP:"<< str <<" Name:"<h_name<< std::endl;
				}
			}
		}
		delete   Buffer;
		WNetCloseEnum(hEnum);
	}
	WSACleanup();
}