Most Politically Correct Way To Call RasHangUp

Environment: VC5-6, Win9x-NT4

Problem

The RasHangUp function terminates a remote access connection. The connection is specified with a RAS connection handle. The function releases all RASAPI32.DLL resources associated with the handle. (MSDN)

Then, in remarks, it is mentioned that application should sleep about 3 seconds, or until RasGetConnectStatus returns ERROR_INVALID_HANDLE. In article Disconnect Dialup Connection author don't carry about that but if you realy just call RasHangUp and exit - you can "hang" both modem and rnaapp (application that implement Dial-Up Service). Furthermore, if you do everything as described in MSDN you still may receive the following error message:
RNAAPP caused an invalid page fault in module xxxx.

Solution

This problem was a besetting sin when I wrote my Dial-up dialer program, until I found solution that work in my program now:


    DWORD dwRet;
    RASCONNSTATUS rStatus;
    ZeroMemory(&rStatus, sizeof(RASCONNSTATUS));
    rStatus.dwSize = sizeof(RASCONNSTATUS);
    dwRet = RasGetConnectStatus(hRasConn, &rStatus);
    if (dwRet != ERROR_INVALID_HANDLE)
    {
        RasHangUp(hRasConn);  // hRasConn - valid handle to the RAS connection
        MSG msg;
        while (dwRet != ERROR_INVALID_HANDLE)
        {
            while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
            {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }
        }
        dwRet = RasGetConnectStatus(hRasConn, &rStatus);
    }

Actually, I remove some unimportant shuff so check this code before using...

History



Comments

  • cut + paste ???

    Posted by Legacy on 08/10/1999 12:00am

    Originally posted by: homer

    don't you mean this ...
    
    

    DWORD dwRet;
    RASCONNSTATUS rStatus;
    ZeroMemory(&rStatus, sizeof(RASCONNSTATUS));
    rStatus.dwSize = sizeof(RASCONNSTATUS);
    dwRet = RasGetConnectStatus(hRasConn, &rStatus);
    if (dwRet != ERROR_INVALID_HANDLE)
    {
    RasHangUp(hRasConn); // hRasConn - valid handle to the RAS connection
    MSG msg;
    while (dwRet != ERROR_INVALID_HANDLE)
    {
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
    {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
    }
    dwRet = RasGetConnectStatus(hRasConn, &rStatus);
    }
    }

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • Live Event Date: September 16, 2014 @ 11:00 a.m. ET / 8:00 a.m. PT Are you starting an on-premise-to-cloud data migration project? Have you thought about how much space you might need for your online platform or how to handle data that might be related to users who no longer exist? If these questions or any other concerns have been plaguing you about your migration project, check out this eSeminar. Join our speakers Betsy Bilhorn, VP, Product Management at Scribe, Mike Virnig, PowerSucess Manager and Michele …

  • A global data storage provider whose business is booming needed a best-in-class data center to serve as the backbone of its technical operations going forward—and it needed it delivered within a year.

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds