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

  1. #1
    Join Date
    May 2008
    Posts
    1

    Question 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
    Last edited by PeejAvery; May 28th, 2008 at 09:18 AM. Reason: Fixed code tags.

  2. #2
    Join Date
    Nov 2003
    Posts
    1,797

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

    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

  3. #3
    Join Date
    Jun 2013
    Posts
    1

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

    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!!

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