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Existem API do Win onde podes ir buscar essa informação (como aliás alguém já pesquisou no teu nick, com toda a certeza).

Alternativamente podes utilizar a ideia do ping sem precisar de fugir da nossa beloved framework:

Public Class Form1
    Private WithEvents NW As New Net.NetworkInformation.Ping

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        NW.SendAsync("www.google.com", Nothing)
    End Sub

    Private Sub NW_PingCompleted(ByVal sender As Object, ByVal e As System.Net.NetworkInformation.PingCompletedEventArgs) Handles NW.PingCompleted
            MsgBox("oh, oh")
        End Try
    End Sub
End Class

É melhor trabalhares com o assíncrono para não empanares a aplicação.

Sérgio Ribeiro

"Great coders aren't born. They're compiled and released"
"Expert coders do not need a keyboard. They just throw magnets at the RAM chips"

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