CD Change Notifications

Environment: The demo was written using Visual C++ 6.0

Getting Notification of CD-ROM Insertion or Removal:

Some Win32 applications need to know when the user inserts or removes a compact disc from a CD-ROM drive without polling for media changes. Windows NT provide a way to notify these applications through the WM_DEVICECHANGE message. This article explains how to handle the WM_DEVICECHANGE message to detect CD-ROM media changes. Furthermore is describes a way to cancel Autoplay application using the QueryCancelAutoPlay event.

Download demo project - 18 KB

Date Last Updated: April 4, 1999



Comments

  • From an ActiveX control?

    Posted by Legacy on 07/08/2003 12:00am

    Originally posted by: Mike

    How can I get the WM_DEVICECHANGE message from within an ActiveX control?

    Reply
  • To make this work in MFC is quite simple

    Posted by Legacy on 08/20/2001 12:00am

    Originally posted by: Uday A. Prabhune

    I made MFC dialog application named CDChange.
    
    The application class is CCDChangeApp.
    The dialog class is CCDChangeDlg.
    The application should stop CD autoplay as long as the application is running. For this to work following things need to be done:

    1. In the CDChangeDlg.cpp file, add-
    const UINT WM_AUTOPLAY = ::RegisterWindowMessage(_T("QueryCancelAutoPlay"));
    2. In the message map in CDChangeDlg.cpp add this
    BEGIN_MESSAGE_MAP(CCDChangeDlg, CDialog)
    //{{AFX_MSG_MAP(CCDChangeDlg)
    ...
    //}}AFX_MSG_MAP
    ON_REGISTERED_MESSAGE(WM_AUTOPLAY, OnAutoPlay)
    END_MESSAGE_MAP()
    3. In the CDChangeDlg.cpp, add the OnAutoPlay function.
    BOOL CCDChangeDlg::OnAutoPlay()
    {
    return TRUE; // Cancel autoplay
    }
    4. In the CDChangeDlg.h file, add OnAutoPlay function declaration.
    class CCDChangeDlg : public CDialog
    {
    ...
    BOOL OnAutoPlay();
    }

    That is it. When a CD is inserted, OnAutoPlay function is called which cancels the CD autoplay.

    Reply
  • how to get second cd rom notification

    Posted by Legacy on 09/19/2000 12:00am

    Originally posted by: craig

    It seems the sample works only for the first cd-rom drive. what if i have a second cd-rom attached on the system and i need to get notification about it? any suggestion is appreciated.

    Thanks.

    --Craig

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Cloud computing isn't new, but it's still a hot topic in technology circles. Moving to the cloud has done great things for many businesses. When it comes to handling a basic business necessity, cloud computing has brought many improvements to overall business continuity. Using the cloud for DR makes a lot of sense for many, but it's not exactly the most simple concept. Read this eBook to find answers to all the key questions IT professionals have about cloud-based disaster recovery, and helpful info around the …

  • Do you spend a lot of time thinking about your enemies? Attacker attribution - figuring out who's out to get you - is one of the most important things an organization can do to protect itself.  Because you have no hope of defending yourself if you don't understand who the attackers are. Good news? Every organization isn't targeted by all the attackers. Bad news? No one can identify your potential attackers as well as you. Read this graphics-rich threat summary for 2014 to determine who might be your next …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date