I hope this isn\'t too basic a question. The title kind of asks it all. :-)
ping also has an option in Windows:
ping
-S srcaddr Source address to use.
So you can do something like
ping 10.10.10.1 -l 0 -S 192.168.1.1
where 10.10.10.1 is the destination address and 192.168.1.1 is the address of the source adapter