I have developed an application to send message via TCP client and Listener. I am using a ComboBox and ping system to test which PC is online in the network.
How can I restrict the list to only those PCs on which my messenger application is running?
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I am assuming it is running on a local network...
You should build in message "types" into your app. You can then send out a broadcast "is anyone there?" message. You do this using the broadcast IP subnet address x.x.x.255.
All PCs running your app should interpret the "is anyone there?" message and respond with a "I am here" message type. Collect them and populate your combo box.