Detecting USB Device

[mk48]

I need assistance converting the following C# code which works into VB code. The code detects when a specific type of USB device is connected and disconnected and writes the status to a status strip:

App_PnP_Callback evHandler = new App_PnP_Callback(PnP_Event_Handler);
usbDevices = new USBDeviceList(CyConst.DEVICES_HID, evHandler);

 public void PnP_Event_Handler(IntPtr pnpEvent, IntPtr hRemovedDevice)
        {
            if (pnpEvent.Equals(CyConst.DBT_DEVICEREMOVECOMPLETE))
            {
                USBEventArgs e = new USBEventArgs();
                usbDevices.Remove(hRemovedDevice, e);
            }

            if (pnpEvent.Equals(CyConst.DBT_DEVICEARRIVAL))
            {
                usbDevices.Add();
            }

            myHidDevice = usbDevices[VID, PID] as CyHidDevice;
            CyHidDevice myHidReport = myHidDevice as CyHidDevice;


            if (CheckGenericHidDevice())
            {
                Status.Text = "Connected";
                this.Refresh();
            }
            else
            {
                Status.Text = "Disconnected";
                this.Refresh();
            }
        }


        private bool CheckGenericHidDevice()
        {
            myHidDevice = usbDevices[VID, PID] as CyHidDevice; //Get hold of Voltmeter Device
            if (myHidDevice == null)
            {
                return false;
            }
            else
            {
                return true;
            }
        }

My attempt at converting the code to VB.net. The code compiles but does not detect when I add/remove the usb device:

Dim evHandler As App_PnP_Callback = New App_PnP_Callback(AddressOf PnP_Event_Handler)
        usbDevices = New USBDeviceList(CyConst.DEVICES_HID, evHandler)

    End Sub

    Private Sub PnP_Event_Handler(ByVal pnpEvent As IntPtr, ByVal hRemovedDevice As IntPtr)

        If pnpEvent.Equals(CyConst.DBT_DEVICEREMOVECOMPLETE) Then

            Dim e As USBEventArgs = New USBEventArgs()
            usbDevices.Remove(hRemovedDevice, e)
            'StatusStrip1.Text = "DisConnected"



            If pnpEvent.Equals(CyConst.DBT_DEVICEARRIVAL) Then

                usbDevices.Add()
                'StatusStrip1.Text = "Connected"

            End If


            myHidDevice = usbDevices(VID, PID)
            Dim myHidReport As CyHidDevice = myHidDevice


            If CheckGenericHidDevice() Then

                StatusStrip1.Text = "Connected"
                Me.Refresh()

            Else

                StatusStrip1.Text = "Disconnected"
                Me.Refresh()

            End If
        End If


    End Sub

    Private Function CheckGenericHidDevice() As Boolean

        myHidDevice = usbDevices(VID, PID) 'as CyHidDevice
        If myHidDevice.Equals(Nothing) Then

            Return False

        Else

        Return True
        End If

    End Function

[jmcilhinney]

The first issue I see is the fact that you have nested If statements where there are none in the original C#.