''' <summary>
''' Pings a variation of websites defined in a array and checks for connectivity.
''' </summary>
''' <returns>True if a ping succeeded, False if otherwise.</returns>
''' <remarks></remarks>
Public Function isInternetAvailable() As Boolean
    ' The arrays of sites we want to check for connectivity.
    ' If all fail to ping, the function will return false.
    Dim sitesToCheck() As String = {"www.google.com", _
    "www.microsoft.com", "www.dreamincode.net"}
 
    Dim failedPings As Integer = 0
 
    ' Loop through all hostnames and ping them
    For Each str As String In sitesToCheck
        Try
            My.Computer.Network.Ping(str)
        Catch ex As Exception
            failedPings += 1
        End Try
    Next
 
    ' Couldn't ping any of the hostnames.
    If failedPings = sitesToCheck.Length Then Return False
    Return True
End Function
 
' Example Usage
MessageBox.Show(isInternetAvailable())