C # Listening for USB access

Using system;
Using system. Collections. Generic;
Using system. componentmodel;
Using system. Data;
Using system. drawing;
Using system. text;
Using system. Windows. forms;
Using system. IO;

Namespace U disk update
{
Public partial class form1: Form
{
Public const int wm_devicechange = 0x219;
Public const int dbt_devicearrival = 0x8000;
Public const int dbt_configchangecanceled = 0x0019;
Public const int dbt_configchanged = 0x0018;
Public const int dbt_customevent = 0x8006;
Public const int dbt_devicequeryremove = 0x8001;
Public const int dbt_devicequeryremovefailed = 0x8002;
Public const int dbt_deviceremovecomplete = 0x8004;
Public const int dbt_deviceremovepending = 0x8003;
Public const int dbt_devicetypespecific = 0x8005;
Public const int dbt_devnodes_changed = 0x0007;
Public const int dbt_querychangeconfig = 0x0017;
Public const int dbt_userdefined = 0 xFFFF;

Public form1 ()
{
Initializecomponent ();
}

Private void form1_load (Object sender, eventargs E)
{

}

Protected override void wndproc (ref message m)
{
Try
{
If (M. MSG = wm_devicechange)
{
Switch (M. wparam. toint32 ())
{
Case wm_devicechange:
Break;
Case dbt_devicearrival: // USB flash drive
Driveinfo [] S = driveinfo. getdrives ();
Foreach (driveinfo drive in S)
{
If (drive. drivetype = drivetype. removable)
{
Listbox1.items. Add ("U disk inserted, drive letter:" + drive. Name. tostring ());
Break;
}
}
Break;
Case dbt_configchangecanceled:
Break;
Case dbt_configchanged:
Break;
Case dbt_customevent:
Break;
Case dbt_devicequeryremove:
Break;
Case dbt_devicequeryremovefailed:
Break;
Case dbt_deviceremovecomplete: // unmount the USB flash drive
Break;
Case dbt_deviceremovepending:
Break;
Case dbt_devicetypespecific:
Break;
Case dbt_devnodes_changed:
Break;
Case dbt_querychangeconfig:
Break;
Case dbt_userdefined:
Break;
Default:
Break;
}
}
}
Catch (exception ex)
{
MessageBox. Show (ex. Message );
}
Base. wndproc (ref m );
}