🚀 go-pugleaf

Uri wrote:

> Hi, I did not understand how to use it.

Ok, I tried with my usb key and it works.

RegisterDeviceNotification() tells the OS to send to your app the 
notification messages you want. Without this as you've noted, you don't 
receive the arrival or removal of your device.

First add this to your form constructor:

DEV_BROADCAST_DEVICEINTERFACE NotificationFilter = {0};
NotificationFilter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
NotificationFilter.dbcc_classguid = GUID_DEVCLASS_USB;
RegisterDeviceNotification(Handle,
                            &NotificationFilter,
                            DEVICE_NOTIFY_WINDOW_HANDLE);

And then in your message handler (WndProc or whatever):

if(Message.Msg == WM_DEVICECHANGE)
   {
     switch(Message.WParam)
     {
       case DBT_DEVICEARRIVAL:
         Application->MessageBox("Arrival","USB",MB_OK);
         break;
       case DBT_DEVICEREMOVECOMPLETE:
         Application->MessageBox("Removal","USB",MB_OK);
         break;
     }
   }

Don't know if it works for any USB devices but at least it works for my 
usb key.

HTH
Michel
-- 
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Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
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