Obtaining Computer Names on Network

Hi,

Anyone know how to obtain the computer names on a network? I do not mean by using a dialog box; I wish to get a list, and put them into a flexigrid (or something similar). I may also like to find out the name of a user who is logged onto that computer. I imagine I may need some API calls, or does someone have any knowledge of a component which may have methods for this operation?

Any feedback much appreciated.

Thanks,
Russ

Whoops!
I've managed to find the answer as to what comuter names are on the network. But can anyone tell me how to obtain names of users which might be logged onto these computers?

Thanks,
Russ