windows ip助手函数了解
根据手册，winsock编程中提供的有一类函数叫ip助手函数；比如Ipconfig函数，从名字看应该是可自己编程实现类似ipconfig命令的功能；
刚看到一个示例，是MS提供的，也属于这一类，代码如下，
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iphlpapi.h>
#include <stdio.h>#pragma comment(lib, "iphlpapi.lib")
#pragma comment(lib, "ws2_32.lib")#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))/* Note: could also use malloc() and free() */int main()
{// Declare and initialize variablesPMIB_TCPTABLE pTcpTable;DWORD dwSize = 0;DWORD dwRetVal = 0;char szLocalAddr[128];char szRemoteAddr[128];struct in_addr IpAddr;int i;pTcpTable = (MIB_TCPTABLE *)MALLOC(sizeof(MIB_TCPTABLE));if (pTcpTable == NULL) {printf("Error allocating memory\n");return 1;}dwSize = sizeof(MIB_TCPTABLE);// Make an initial call