This is an small sample code to show how to build our basic gadgeteer web server using VB with Spider and the 4.2 RTM Premium library’s.
Start Visual Studio with a new gadgeteer project and copy/paste…That’s all! (remember add library’s references)

Imports System.Net
Imports System.Text
Imports Microsoft.SPOT.Hardware
 
Imports GHI.Premium.Net
 
Imports GT = Gadgeteer
 
Partial Public Class Program
 
    Private WithEvents ethernet As New EthernetBuiltIn()
    ' 
    Private ip As New IPAddress(New Byte() {0, 0, 0, 0})
    Private WithEvents myweb As WebEvent
    '
    Private WithEvents timer As GT.Timer = New GT.Timer(1000)
 
    Public Sub ProgramStarted()
        'Initialize adapter
        ethernet.Open()
        ethernet.NetworkInterface.EnableDhcp()
        ethernet.NetworkInterface.EnableDynamicDns()
        NetworkInterfaceExtension.AssignNetworkingStackTo(ethernet)
        'app timer on
        timer.Start()
    End Sub
 
    Private Sub ethernet_CableConnectivityChanged(sender As Object, e As GHI.Premium.Net.EthernetBuiltIn.CableConnectivityEventArgs) Handles ethernet.CableConnectivityChanged
        If e.IsConnected Then
            ' reboot device after plug... to startup again
            PowerState.RebootDevice(True)
        End If
    End Sub
 
    Private Sub ReceivedWebEventHandler(path As String, method As WebServer.HttpMethod, responder As Responder) Handles myweb.WebEventReceived
        ' webb response
        responder.Respond(New System.Text.UTF8Encoding().GetBytes("Hello from " + ip.ToString() + " At " + System.DateTime.Now.ToString()), "text/html")
    End Sub
 
    Private tic As Boolean
    Private Sub timer_Tick(timer As Gadgeteer.Timer) Handles timer.Tick
        ' blink debug led... system working
        tic = Not tic
        Mainboard.SetDebugLED(tic)
        ' get an IP from DHCP if no previous one
        If (ip.ToString = "0.0.0.0") And ethernet.IsCableConnected Then
            ip = IPAddress.GetDefaultLocalAddress()
            WebServer.StartLocalServer(ip.ToString(), 80)
            myweb = WebServer.SetupWebEvent("Hello")
        End If
    End Sub
End Class

Regards,
PepLluis,