获到网卡MAC地址

CString GetMacAddress()
{
PIP_ADAPTER_INFO pinfo = NULL;
unsigned long len = 0;
unsigned long nError;
nError = GetAdaptersInfo(pinfo,&len);
if (nError == 0)
{
if (pinfo != NULL)
{
CString temp;
temp.Format("%02X%02X%02X%02X%02X%02X",pinfo->Address[0],pinfo->Address[1],pinfo->Address[2],pinfo->Address[3],pinfo->Address[4],pinfo->Address[5]);
return temp;
}
}
else if (nError == ERROR_BUFFER_OVERFLOW)
{
pinfo = (PIP_ADAPTER_INFO)malloc(len);
nError = GetAdaptersInfo(pinfo,&len);
if (nError == 0)
{
if (pinfo != NULL)
{
CString temp;
temp.Format("%02X%02X%02X%02X%02X%02X",pinfo->Address[0],pinfo->Address[1],pinfo->Address[2],pinfo->Address[3],pinfo->Address[4],pinfo->Address[5]);
return temp;
}
}
}
else
return _T("");

return _T("");

}