6678 EtherGetMacAddr error

Hi,

I have 6678 ndk 2.20.04.26

I am trying to print my mac address using this function

uint EtherGetMacAddr(HANDLE hEther, UINT8 *pMacAddr, uint MaxLen);

and I get the fallowing error:

unresolved symbol EtherGetMacAddr, first referenced in....

thanks

Aviv