hi can someone please tell me how can i access the workgroup using java or any other programming language to find out which computers are on.

I don't know Java, but the windows API functions "NetWkstaGetInfo" and "NetWkstaSetInfo" are in the group of functions the windows programming interface provides to return and set information about other networked computers. You might search on them for more info. I would assume Java provides for making native API calls, but don't know.

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