C++Builder 获取MAC地址

 下面是获取的MAC地址没有"-"的;
AnsiString GetRemoteMACAddress(AnsiString DestIP)
{
        unsigned char MacAddress[6];
        ULONG MacLen = 6;
        if (SendARP(inet_addr(DestIP.c_str()), 0,
                (PULONG)&MacAddress, &MacLen) == NO_ERROR)
        return IntToHex((int)MacAddress[0],2)
                + IntToHex((int)MacAddress[1],2)
                + IntToHex((int)MacAddress[2],2)
                + IntToHex((int)MacAddress[3],2)
                + IntToHex((int)MacAddress[4],2)
                + IntToHex((int)MacAddress[5],2);
        else return "????????????";
}
//获取的MAC地址带下划线”_”
AnsiString _GetRemoteMACAddress(AnsiString DestIP)
{
        AnsiString MacAddress=GetRemoteMACAddress(DestIP);
        for (int i=5;i>0;i--)
                MacAddress.Insert("-",i*2+1);
        return MacAddress;
}