How to: Check Connection Status in Visual Basic
The My.Computer.Network.IsAvailable Property can be used to determine whether the computer has a working network or Internet connection.
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To check whether a computer has a working connection
Determine whether the IsAvailable property is True or False. The following code checks the property's status and reports it:
This code example is also available as an IntelliSense code snippet. In the code snippet picker, it is located in Connectivity and Networking. For more information, see How to: Insert Snippets Into Your Code (Visual Basic).