A USB HID Component for C#

/// <summary>
/// Initialises the device
/// </summary>
/// <param name="strPath">Path to the device</param>
private void Initialise(string strPath)
{
    // Create the file from the device path;
    m_hHandle = CreateFile(strPath, GENERIC_READ | GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, IntPtr.Zero);

    if (m_hHandle == InvalidHandleValue)
    {
        // some devices require sharing to be enabled
        m_hHandle = CreateFile(strPath, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, IntPtr.Zero);
    }

/// <summary>
/// Initialises the device
/// </summary>
/// <param name="strPath">Path to the device</param>
private void Initialise(string strPath)
{
    // Create the file from the device path;
    m_hHandle = CreateFile(strPath, GENERIC_READ | GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, IntPtr.Zero);

    if (m_hHandle == InvalidHandleValue)
    {
        // some devices require sharing to be enabled
        m_hHandle = CreateFile(strPath, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, IntPtr.Zero);
    }

if (specified_device != null)
              {
                  history = true;
              }
              else
              {
                  specified_device = SpecifiedDevice.FindSpecifiedDevice(this.vendor_id, this.product_id);    // look for the device on the USB bus

                  if (specified_device != null)   // did we find it?
                  {
                      if (OnSpecifiedDeviceArrived != null)
                      {
                          this.OnSpecifiedDeviceArrived(this, new EventArgs());
                          specified_device.DataRecieved += new DataRecievedEventHandler(OnDataRecieved);
                          specified_device.DataSend += new DataSendEventHandler(OnDataSend);
                      }
                  }
                  else
                  {
                      if (OnSpecifiedDeviceRemoved != null && history)
                      {
                          this.OnSpecifiedDeviceRemoved(this, new EventArgs());
                      }
                  }
              }