MFC获取本机MAC地址

//数组的大小只能是13
 1 GetMacAdress(char arr[],int Num){
 2     char MAC[13]={0};
 3     PIP_ADAPTER_INFO pAdapterInfo;
 4     PIP_ADAPTER_INFO pAdapter = NULL;
 5     DWORD dwRetVal = 0;
 6     pAdapterInfo = (IP_ADAPTER_INFO*)malloc(sizeof(IP_ADAPTER_INFO));
 7     ULONG ulOutBufLen = sizeof(IP_ADAPTER_INFO);
 8     if(GetAdaptersInfo(pAdapterInfo,&ulOutBufLen) != ERROR_SUCCESS)
 9     {
10         free(pAdapterInfo);
11         pAdapterInfo=(IP_ADAPTER_INFO*)malloc(ulOutBufLen);
12 
13     }
14     if((dwRetVal=GetAdaptersInfo(pAdapterInfo,&ulOutBufLen)) == NO_ERROR)
15     {
16         pAdapter = pAdapterInfo;
17         while(pAdapter)
18         {
19             if(strstr(pAdapter->Description,"PCI"))
20             {
21                 sprintf_s(MAC,"%02X%02X%02X%02X%02X%02X",pAdapter->Address[0],pAdapter->Address[1],pAdapter->Address[2],pAdapter->Address[3],pAdapter->Address[4],pAdapter->Address[5]);
22                 strcpy_s(arr,Num,MAC);
23 
24             }
25             pAdapter=pAdapter->Next;
26         }
27     }else{
28         strcpy_s(MAC,sizeof(MAC),"NONE");
29         strcpy_s(arr,Num,MAC);
30     }
31 }