Set up VLANs on Cisco Switches

How can I set up Inter-VLANs on a Cisco Catalyst 3750 Series Switches with Inter-VLANs on 3Com SuperStack 3-Switch 4200 Series? I will be using a trunk port for both Cisco Catalyst 3750 and 3Com Superstack 4200 Series. How can I set it up?
