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Connected to the Internet?

I run applications on my laptop. I have features that are trying to send e-mails. When I am not connected to the Internet, I have to skip these parts.

How can I know for sure if I am connected to the Internet?

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appari

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iboutchkine

Imports System.Runtime.InteropServices

<DllImport("wininet.dll")> _
Public Function InternetGetConnectedState( _
ByVal lpdwFlags As Integer, ByVal res As Integer) As Boolean
End Function

Public Function InternetConnectionExists() As Boolean
' Determines if there is a connection to the Internet.
' Note that InternetGetConnectedState cannot be considered
' 100% reliable. An issue can occur if an internet connection
' has never been configured, the function may return true, even
' though there is no internet connection.
'

Dim e As Integer = 0
Dim ret As Boolean = InternetGetConnectedState(e, 0)

Return ret

End Function

Éric Moreau

ASKER

iboutchkine, when I try your code, I get the following exeption (on the line: Dim ret As Boolean = InternetGetConnectedState(e, 0))

An unhandled exception of type 'System.InvalidProgramException' occurred in InternetConnection.exe

Additional information: Error: PInvoke item (field,method) must be Static.