Can get only USB device insertion/removal and not IDE CD/DVD in WinXP Service

Hello,
I'm writing a service for the WinXP OS. My need is to get notification about insertion and removal of USB disks and notification on media change in CD/DVD. I've used the RegisterDeviceNotification as stated within the MSDN with DEVICE_NOTIFY_ALL_INTERFACE_CLASSES but I still receive only nitification about USB and not for CD/DVD.
Here is the relevant part of the ServiceMain:

Code:

---

VOID ServiceMain(DWORD argc, char* argv[]) {

    serviceStatusHandle = RegisterServiceCtrlHandlerEx((LPWSTR)SERVICE_NAME, (LPHANDLER_FUNCTION_EX) ServiceCtrlHandler, 0);
    OutputDebugString(TEXT("Registering Service Ctrl Handler"));
 

    if (!serviceStatusHandle) {
        terminateService(GetLastError());
        return;
    }

    BOOL success = UpdateSCMStatus(SERVICE_START_PENDING,
                NO_ERROR, 0, 1, 5000);
    if (!success) {
        terminateService(GetLastError());
        return;
    }


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

    hDevNotify = RegisterDeviceNotification(
            serviceStatusHandle,
            &NotificationFilter,
            DEVICE_NOTIFY_SERVICE_HANDLE | DEVICE_NOTIFY_ALL_INTERFACE_CLASSES );
         
    if (hDevNotify == NULL) OutputDebugString(TEXT("Registering device notification: error")    );
    else OutputDebugString(TEXT("Registering device notification: success"));

...

}

---

And here is the relevant part of the ServiceCtrlHandler:

Code:

---

VOID ServiceCtrlHandler(DWORD controlCode, DWORD evtype, PVOID evdata, PVOID Context) {
    BOOL success;
    DWORD threadId;
 
    switch(controlCode) {
        case SERVICE_CONTROL_DEVICEEVENT:
            OutputDebugString(TEXT("SERVICE_CONTROL_DEVICEEVENT"));
            DeviceEventNotify(evtype, evdata);
            break;
...
}

---

Using DebugView I see that there are no errors when registering device notification, but I have DEVICEEVENT only when I insert or remove an usb device, instead if I eject or load a CD/DVD nothing happens.

I'll keep on trying, but every help will be very appreciate, because I don't know what to do more.

Regards,
ale

I've been playing around with RegisterDeviceNotification() myself, and at first I was getting the same results.

My code is just a console app. At first, I created a "message only" window (by using HWND_MESSAGE as the parent). This received USB changes but not CD/DVD media changes. So then I made it a "real" window (hidden, top-most) and all of sudden I started getting CD/DVD media changes! Must have something to do with how windows are enumerated to recieve WM_DEVICECHANGE.

I also discovered that if autoplay is disabled at the driver level, then no media change notifications are delivered. It's a registry key you'll want check: http://www.microsoft.com/technet/pro....mspx?mfr=true

Here's my code. It's not service oriented, but you can run it to see if device notifications are atleast working in a non-service app.

Code:

---

#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <dbt.h>

#include <iostream>
#include <iomanip>
using namespace std;

#define USE_CDROM_GUID_ONLY

// this doesn't work for CD/DVD media change events
//#define USE_MESSAGE_ONLY_WINDOW

//-----------------------------------------------------------------------------

LRESULT CALLBACK WinProc(HWND hwnd, UINT msg,
                        WPARAM wParam, LPARAM lParam)
{
    if (msg == WM_DEVICECHANGE)
    {
        cout << "WM_DEVICECHANGE, wParam = 0x"
            << setw(4) << hex << setfill('0') << int(wParam) << dec
            << endl;
    }//if
    else
        cout << "Got msg " << msg << ", " << int(wParam)
            << ", " << int(lParam) << endl;
    return 1;
}//WinProc

//-----------------------------------------------------------------------------

int main()
{
    const char *className = "DevNotifyTest";

    WNDCLASSA wincl = {0};
    wincl.hInstance = GetModuleHandle(0);
    wincl.lpszClassName = className;
    wincl.lpfnWndProc = WinProc;

    if (!RegisterClassA(&wincl))
    {
        DWORD le = GetLastError();
        cout << "RegisterClassA() failed, le = " << le << endl;
        return 1;
    }//if

    HWND parent = 0;
#ifdef USE_MESSAGE_ONLY_WINDOW
    parent = HWND_MESSAGE;
#endif
    HWND hwnd = CreateWindowExA(WS_EX_TOPMOST, className, className,
                                0, 0, 0, 0, 0, parent, 0, 0, 0);
    if (!hwnd)
    {
        DWORD le = GetLastError();
        cout << "CreateWindowExA() failed, le = " << le << endl;
        return 1;
    }//if

    GUID cdromDevIntGuid =
        {0x53F56308, 0xB6BF, 0x11D0,
            {0x94, 0xF2, 0x00, 0xA0, 0xC9, 0x1E, 0xFB, 0x8B}};

    DEV_BROADCAST_DEVICEINTERFACE_A notifyFilter = {0};
    notifyFilter.dbcc_size = sizeof(notifyFilter);
    notifyFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
    notifyFilter.dbcc_classguid = cdromDevIntGuid;

    HDEVNOTIFY hDevNotify = 
        RegisterDeviceNotificationA(hwnd, &notifyFilter,
#ifndef USE_CDROM_GUID_ONLY
                                    DEVICE_NOTIFY_ALL_INTERFACE_CLASSES |
#endif
                                    DEVICE_NOTIFY_WINDOW_HANDLE);
    if (!hDevNotify)
    {
        DWORD le = GetLastError();
        cout << "RegisterDeviceNotificationA() failed, le = " << le << endl;
        return 1;
    }//if

    MSG msg;
    for (;;) // ctrl-c to exit ;)
    {
        BOOL bRet = GetMessage(&msg, hwnd, 0, 0);
        if ((bRet == 0) || (bRet == -1))
            break;

        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }//while

    return 0;
}//main

---

gg

This is the perfect snippet to get started with USB device detection in a light-weight way. Worked right out of the box. Thank you!!