help ... trapping DBT_DEVICEARRIVAL in Windows2000

hi,

I've got an application which checks for the
WM_DEVICECHANGE message w/ the DBT_DEVICEARRIVAL message.
I have done this by using the RegisterDeviceNotification() call.

Basically looking for an insertion of a USB devices. For testing
purposes I used a USB mouse. I expected to trap DBT_DEVICEARRIVAL
message. Instead I am always getting DBT_DEVNODES_CHANGED.



This is the code I have used.

/* This section is done in the InitDialog() section */

if (DoRegisterDeviceInterface (GUID_CLASS_USB_DEVICE
&hNotification) == TRUE)
AfxMessageBox("DoRegisterDeviceInterface GUID_CLASS_USB_DEVICE
SUCCESS");
else
AfxMessageBox ("DoRegisterDeviceInterface GUID_CLASS_USB_DEVICE
FAILED");


if (DoRegisterDeviceInterface (GUID_CLASS_USB_DEVICE,
&hNotification) == TRUE)
AfxMessageBox ("DoRegisterDeviceInterface GUID_CLASS_USBHUB SUCCESS");
else
AfxMessageBox ("DoRegisterDeviceInterface GUID_CLASS_USBHUB FAILED");





BOOL DoRegisterDeviceInterface(GUID InterfaceClassGuid, HDEVNOTIFY
*hDevNotify)
{
DEV_BROADCAST_DEVICEINTERFACE NotificationFilter;
DWORD Err;

ZeroMemory( &NotificationFilter, sizeof(NotificationFilter) );
NotificationFilter.dbcc_size =
sizeof(DEV_BROADCAST_DEVICEINTERFACE);
NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;

NotificationFilter.dbcc_classguid = InterfaceClassGuid;

*hDevNotify = RegisterDeviceNotification( GetDesktopWindow(),
&NotificationFilter,
DEVICE_NOTIFY_WINDOW_HANDLE
);

if(!*hDevNotify)
{
Err = GetLastError();
AfxMessageBox( "RegisterDeviceNotification failed: %lx.\n",
Err);
return FALSE;
}

return TRUE;
}



LRESULT CUsb786Dlg::WindowProc(UINT message, WPARAM wParam, LPARAM
lParam)
{
int s32Temp;
char as8Temp[10];

switch (message)
{
HANDLE_MSG (GetDesktopWindow()->GetSafeHwnd(), WM_DEVICECHANGE,
Usb_OnDeviceChange);
}


BOOL Usb_OnDeviceChange
(
HWND hwnd,
UINT uEvent,
DWORD dwEventData
)
{
int s32Temp;
char as8Temp[10];
BOOL bResult;
SP_DEVINFO_DATA strDevInfoData;
SP_DEVICE_INTERFACE_DATA strDevInterfaceData;

AfxMessageBox ("Device Changed");
switch (uEvent)
{
case DBT_DEVNODES_CHANGED:
AfxMessageBox ("DBT_DEVNODES_CHANGED");
break;
case DBT_CONFIGCHANGECANCELED:
AfxMessageBox (" DBT_CONFIGCHANGECANCELED ");
break;
case DBT_CONFIGCHANGED:
AfxMessageBox ("DBT_CONFIGCHANGED ");
break;
case DBT_CUSTOMEVENT:
AfxMessageBox ("DBT_CUSTOMEVENT ");
break;
case DBT_DEVICEARRIVAL:
AfxMessageBox (" DBT_DEVICEARRIVAL ");
break;
case DBT_DEVICEQUERYREMOVE:
AfxMessageBox ("DBT_DEVICEQUERYREMOVE ");
break;
case DBT_DEVICEQUERYREMOVEFAILED:
AfxMessageBox ("DBT_DEVICEQUERYREMOVEFAILED ");
break;
case DBT_DEVICEREMOVECOMPLETE:
AfxMessageBox ("DBT_DEVICEREMOVECOMPLETE ");
break;
case DBT_DEVICEREMOVEPENDING:
AfxMessageBox ("DBT_DEVICEREMOVEPENDING ");
break;
case DBT_DEVICETYPESPECIFIC:
AfxMessageBox ("DBT_DEVICETYPESPECIFIC ");
break;
case DBT_QUERYCHANGECONFIG:
AfxMessageBox (" DBT_QUERYCHANGECONFIG ");
break;
case DBT_USERDEFINED:
AfxMessageBox ("DBT_USERDEFINED ");
break;
}

return TRUE;
}


please Help me out.
thanks.

 

GUID_CLASS_USB_DEVICE is not interface class. It is PNP device class. You
won't get notifications for such GUID.

 

hi,

" GUID_CLASS_USB_DEVICE is not interface class. It is PNP device
class. You
won't get notifications for such GUID."


Could you tell me where to look for interface class GUIDs for Usb
mouse and Bulk transfer devices.

Surej.