protected IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
// Intercept the WM_DEVICECHANGE message
if (msg == Dbt.WM_DEVICECHANGE)
{
// Get the message event type
int nEventType = wParam.ToInt32();
// Check for devices being connected or disconnected
if (nEventType == Dbt.DBT_DEVICEARRIVAL ||
nEventType == Dbt.DBT_DEVICEREMOVECOMPLETE)
{
Dbt.DEV_BROADCAST_HDR hdr = new Dbt.DEV_BROADCAST_HDR();
// Convert lparam to DEV_BROADCAST_HDR structure
Marshal.PtrToStructure(lParam, hdr);
if (hdr.dbch_devicetype == Dbt.DBT_DEVTYP_DEVICEINTERFACE)
{
Dbt.DEV_BROADCAST_DEVICEINTERFACE_1 devIF = new Dbt.DEV_BROADCAST_DEVICEINTERFACE_1();
// Convert lparam to DEV_BROADCAST_DEVICEINTERFACE structure
Marshal.PtrToStructure(lParam, devIF);
// Get the device path from the broadcast message
string devicePath = new string(devIF.dbcc_name);
// Remove null-terminated data from the string
int pos = devicePath.IndexOf((char)0);
if (pos != -1)
{
devicePath = devicePath.Substring(0, pos);
}
// An HID device was connected or removed
if (nEventType == Dbt.DBT_DEVICEREMOVECOMPLETE || nEventType == Dbt.DBT_DEVICEARRIVAL)
{
//MessageBox.Show("Device \"" + devicePath + "\" was removed");
listCOMPorts();
}
}
}
}
return(IntPtr.Zero);
}
protected override void WndProc(ref Message m)
{
try
{
if (m.Msg == 0x219)
{
int wParam = m.WParam.ToInt32();
if (wParam == 0x8000)
{
if (IsDeviceArrivalEnabled)
{
DDI_HID.instance().open();
DDI_TOOLSTICK.instance().open();
}
}
else if ((wParam == 0x8004) && IsDeviceRemovalEnabled)
{
Dbt.DEV_BROADCAST_HDR structure = new Dbt.DEV_BROADCAST_HDR();
Marshal.PtrToStructure(m.LParam, structure);
if (structure.dbch_devicetype == 5)
{
Dbt.DEV_BROADCAST_DEVICEINTERFACE_1 dev_broadcast_deviceinterface_ = new Dbt.DEV_BROADCAST_DEVICEINTERFACE_1();
Marshal.PtrToStructure(m.LParam, dev_broadcast_deviceinterface_);
string removedDevicePath = new string(dev_broadcast_deviceinterface_.dbcc_name).Trim(new char[1]);
removedDevicePath = removedDevicePath.Substring(0, removedDevicePath.IndexOf('\0')).Trim();
DDI_HID.instance().closeDevice(removedDevicePath);
DDI_TOOLSTICK.instance().closeDevice(removedDevicePath);
}
}
}
base.WndProc(ref m);
}
catch (Exception exception)
{
_log.Error("Error at HID message: " + exception.Message);
}
}
