/// <summary>
/// Update UI when media state changes.
/// </summary>
/// <param name="sender"></param>
/// <param name="State"></param>
private void gxTerminal1_OnMediaStateChange(object sender, Gurux.Common.MediaState State)
{
    try
    {
        bool bOpen;
        bOpen = State == Gurux.Common.MediaState.Open;
        HexCB.Enabled = ! bOpen;
        OpenBtn.Enabled = ! bOpen;
        SendText.Enabled = bOpen;
        SendBtn.Enabled = bOpen;
        CloseBtn.Enabled = bOpen;
        ReceivedText.Enabled = bOpen;
        StatusTimer.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;
        }
        //Read network status if media is opened.
        if (bOpen)
        {
            StatusTimer_Tick(StatusTimer, new System.EventArgs());
        }
        else
        {
            RSSITB.Text = "";
            BERTB.Text = "";
            BatteryCapacityTB.Text = "";
            PowerConsumptionTB.Text = "";
            NetworkStatusTB.Text = "";
        }
    }
    catch (Exception Ex)
    {
        MessageBox.Show(Ex.Message);
    }
}

                ''' <summary>
''' Update UI when media state changes.
''' </summary>
Private Sub GxTerminal1_OnMediaStateChange(ByVal sender As System.Object, ByVal State As Gurux.Common.MediaState) Handles GxTerminal1.OnMediaStateChange
    Try
        Dim bOpen As Boolean
        bOpen = State = Gurux.Common.MediaState.Open
        HexCB.Enabled = Not bOpen
        OpenBtn.Enabled = Not bOpen
        SendText.Enabled = bOpen
        SendBtn.Enabled = bOpen
        CloseBtn.Enabled = bOpen
        ReceivedText.Enabled = bOpen
        StatusTimer.Enabled = 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
        'Read network status if media is opened.
        If bOpen Then
            StatusTimer_Tick(StatusTimer, New System.EventArgs())
        Else
            RSSITB.Text = ""
            BERTB.Text = ""
            BatteryCapacityTB.Text = ""
            PowerConsumptionTB.Text = ""
            NetworkStatusTB.Text = ""
        End If
    Catch Ex As Exception
        MessageBox.Show(Ex.Message)
    End Try
End Sub

                Private Sub GXTerminal1_OnMediaStateChange(ByVal sender As Object, ByVal State As GuruxTerminalCtl.GX_MEDIA_STATE_CHANGE)
On Error GoTo GXErr
    Dim bOpen As Boolean
    bOpen = State = GX_MEDIA_STATE_CHANGE_OPEN
    HexCB.Enabled = Not bOpen
    OpenBtn.Enabled = Not bOpen
    SendText.Enabled = bOpen
    SendBtn.Enabled = bOpen
    CloseBtn.Enabled = bOpen
    ReceivedText.Enabled = bOpen
    StatusTimer.Enabled = 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
    'Read network status if media is opened.
    If bOpen Then
        StatusTimer_Timer
    Else
        RSSITB.Text = ""
        BERTB.Text = ""
        BatteryCapacityTB.Text = ""
        PowerConsumptionTB.Text = ""
        NetworkStatusTB.Text = ""
    End If
    Exit Sub
GXErr:
    MsgBox Err.Description
End Sub