private static void OnDeviceArrival(UsbNotificationEventArgs args)
{
if (DeviceArrival != null)
{
DeviceArrival(null, args);
}
}
private static void OnDeviceRemoveComplete(UsbNotificationEventArgs args)
{
if (DeviceRemovalComplete != null)
{
DeviceRemovalComplete(null, args);
}
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == WmDevicechange)
{
if ((int)m.WParam != DbtDeviceArrival && (int)m.WParam != DbtDeviceRemoveComplete)
{
return;
}
string name = null;
var hdr = (DeviceBroadcastHeader)Marshal.PtrToStructure(m.LParam, typeof(DeviceBroadcastHeader));
var type = hdr.dbcc_devicetype;
if (type == DeviceType.DBT_DEVTYP_PORT)
{
var prt = (DEV_BROADCAST_PORT)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_PORT));
name = new string(prt.dbcp_name);
}
else if (type == DeviceType.DBT_DEVTYP_DEVICEINTERFACE)
{
var dev = (DEV_BROADCAST_DEVICEINTERFACE)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_DEVICEINTERFACE));
name = new string(dev.dbcc_name);
}
if (type == null)
{
return;
}
if (name != null)
{
name = name.Substring(0, name.IndexOf('\0'));
}
var args = new UsbNotificationEventArgs(type, name);
switch ((int)m.WParam)
{
case DbtDeviceRemoveComplete:
OnDeviceRemoveComplete(args); //
break;
case DbtDeviceArrival:
OnDeviceArrival(args);
break;
}
}
}
