/// <summary>
/// Update UI when media state changes.
/// </summary>
/// <param name="sender"></param>
/// <param name="State"></param>
private void gxsnmp1_OnMediaStateChange(object sender, Gurux.Common.MediaState State)
{
    bool bOpen;
    bOpen = State == Gurux.Common.MediaState.Open;
    SendBtn.Enabled = bOpen;
    DataTB.Enabled = bOpen;
    CloseBtn.Enabled = bOpen;
    SendText.Enabled = bOpen;
    WriteBtn.Enabled = bOpen;
    OpenBtn.Enabled = ! bOpen;
    SyncCB.Enabled = ! bOpen;
    PacketCounterTimer.Enabled = bOpen;
    //Close interval timer if media is closed.
    if (! bOpen)
    {
        IntervalTB.Enabled = false;
        IntervalTimer.Enabled = false;
        IntervalBtn.Enabled = false;
    }
    else
    {
        IntervalTB.Enabled = true;
        IntervalBtn.Enabled = true;
    }
}

                ''' <summary>
''' Update UI when media state changes.
''' </summary>
Private Sub Gxsnmp1_OnMediaStateChange(ByVal sender As System.Object, ByVal State As Gurux.Common.MediaState) Handles Gxsnmp1.OnMediaStateChange
    Dim bOpen As Boolean
    bOpen = (State = Gurux.Common.MediaState.Open)
    SendBtn.Enabled = bOpen
    DataTB.Enabled = bOpen
    CloseBtn.Enabled = bOpen
    SendText.Enabled = bOpen
    WriteBtn.Enabled = bOpen
    OpenBtn.Enabled = Not bOpen
    SyncCB.Enabled = Not bOpen
    PacketCounterTimer.Enabled = bOpen
    'Close interval timer if media is closed.
    If Not bOpen Then
        IntervalTB.Enabled = False
        IntervalTimer.Enabled = False
        IntervalBtn.Enabled = False
    Else
        IntervalTB.Enabled = True
        IntervalBtn.Enabled = True
    End If
End Sub

                Private Sub GXSNMP1_OnMediaStateChange(ByVal sender As Object, ByVal State As GuruxSNMPCtl.GX_MEDIA_STATE_CHANGE)
    Dim bOpen As Boolean
    bOpen = (State = GX_MEDIA_STATE_CHANGE_OPEN)
    SendBtn.Enabled = bOpen
    DataTB.Enabled = bOpen
    CloseBtn.Enabled = bOpen
    SendText.Enabled = bOpen
    WriteBtn.Enabled = bOpen
    OpenBtn.Enabled = Not bOpen
    SyncCB.Enabled = Not bOpen
    PacketCounterTimer.Enabled = bOpen
    'Close interval timer if media is closed.
    If Not bOpen Then
        IntervalTB.Enabled = False
        IntervalTimer.Enabled = False
        IntervalBtn.Enabled = False
    Else
        IntervalTB.Enabled = True
        IntervalBtn.Enabled = True
    End If
End Sub