Anita,
There is a public domain library that has numerous WIN32API functions within it - one of them is the ethernet address.
http://www.fastwrite.com/This library contains two files KERNEL.DLL and FOCUS.FLL. Place the KERNEL.DLL in you windows\system folder and FOCUS.FLL in your libs folder and in your startup code include a SET LIBRARY TO Libs\FOCUS.FLL ADDI
...tim
PS I have not tested this function