A USB HID Component for C#

protected override void OnHandleCreated(EventArgs e) and<br />
protected override void WndProc(ref Message m)

public partial class FrmMain : Form
    {
        measClass myMeas;
        
        public FrmMain()
        {
            InitializeComponent();
            myMeas = new measClass();
        }
        private void FrmMain_Load(object sender, EventArgs e)
        {
            while (!myMeas.portopen)
            {
                if (MessageBox.Show("USB hardware not found, check USB connection", "Hardware Error", MessageBoxButtons.AbortRetryIgnore,               MessageBoxIcon.Error) == DialogResult.Abort)
                {
                    Environment.Exit(0);
                }
            }
            // do rest of the things, main applications starts
        }
     }

public class measClass
        {
            UsbHidPort myUsb;
            public bool portopen = false;

            public measClass()
            {
                myUsb = new UsbHidPort();
                myUsb.OnSpecifiedDeviceRemoved += new System.EventHandler(this.usb_OnSpecifiedDeviceRemoved);
                myUsb.OnDeviceArrived += new System.EventHandler(this.usb_OnDeviceArrived);
                myUsb.OnDeviceRemoved += new System.EventHandler(this.usb_OnDeviceRemoved);
                myUsb.OnDataRecieved += new UsbLibrary.DataRecievedEventHandler(this.usb_OnDataRecieved);
                myUsb.OnDataSend += new System.EventHandler(this.usb_OnDataSend);
                myUsb.OnSpecifiedDeviceArrived += new System.EventHandler(this.usb_OnSpecifiedDeviceArrived);
                myUsb.VendorId = 0x4242;
                myUsb.ProductId = 0x0002;
                myUsb.CheckDevicePresent();
            }

            private void usb_OnSpecifiedDeviceArrived(object sender, EventArgs e)
            {
                portopen = true;
            }

            // same way all the other usb_on handlers.
        }