RE: user defined WM_ question: update

Nope, same objective, I was just trying to re-word the help request. I wrote a test app that implements InternetGetConnectedState( ) and even on a machine with an active internet connection, such as this one, I get INTERNET_STATE_DISCONNECTED as the return and that of course fires  my message box stating that fact. I don't know how much yahoo will mangle my code but what I am using is pasted below. It is inside an OnClicked( ) handler attached to a UI button on an MFC Dialog app.

//start code

    BOOL bConnected;
    DWORD dwFlags;

    bConnected = InternetGetConnectedState(&dwFlags, 0);
    if(bConnected)
    {
        if(dwFlags & INTERNET_STATE_CONNECTED)
        {
            bConnected = TRUE;
            MessageBox("Network Is Connected...","Network Connected",MB_OK);
        }
        else if(dwFlags & INTERNET_STATE_DISCONNECTED) //this keeps firing even if 
        {                                                                                  //connected  to internet  
            bConnected = FALSE;
            MessageBox("Network Disconnected...","Network Not Connected",MB_OK);
        }
        else if(dwFlags & INTERNET_STATE_DISCONNECTED_BY_USER)
        {
            bConnected = FALSE;
            MessageBox("Network Disconnected By User Request...","Network Not Connected",MB_OK);
        }
        else if(dwFlags & INTERNET_STATE_IDLE)
        {
            bConnected = TRUE;
            MessageBox("Network State Idle...","Network Not Busy",MB_OK);
        }
        else if(dwFlags & INTERNET_STATE_BUSY)
        {
            bConnected = TRUE;
            MessageBox("Network Busy: Wininet requests ...","Network Busy",MB_OK);
        }
        else
        {
            //empty for now
        }
    }
    else
    {
        MessageBox("Network Not Connected...","Network Failure", MB_OK);
    }


//end code

 As a side note, I'm still trying to figure out how to get a WM_USER event to fire automatically. Any ideas?

-Eric 

--- On Tue, 8/25/09, Richard Howells <[email protected]> wrote:

From: Richard Howells <[email protected]>
Subject: RE: [OT] user defined WM_ question: update
To: [email protected]
Date: Tuesday, August 25, 2009, 3:57 PM










        


 
 
















Hey – did you change your objective?   

Original “event that I need to trap is a network failure
of any kind”,  

Recent “network has limited or no connectivity” 

   

Network.IsConnected does call InternetGetConnectedState (not
the Ex version) but it does a whole stack of other stuff FIRST. 

   



Cheers, 

   

Richard 

richard-yP/[email protected] 

www.dynamisys.co.uk 

L: (+44) (0)1793 731225 

M: (+44) (0)7732 971786 

   

Dynamisys Ltd is registered, No 4152561, in the UK 



   





From:
[email protected] [mailto:[email protected]] On
Behalf Of Eric Strain

Sent: 25 August 2009 23:49

To: [email protected]

Subject: Re: [OT] user defined WM_ question: update 





   

   








 
  
    I looked at that function and it looks like that
  might do the trick. I'll have to write a test app and test it first but it
  looks promising. Thanks.

  

  -Eric 

  

  --- On Tue, 8/25/09, Stoyan Damov <[email protected]>
  wrote: 
  

  From: Stoyan Damov <[email protected]>

  Subject: Re: [OT] user defined WM_ question: update

  To: [email protected]

  Date: Tuesday, August 25, 2009, 3:26 PM 
  
  You could poll the interfaces
  in interest by calling

  InternetGetConnectedStateEx, or harness your Google skills ;)

  

  On Wed, Aug 26, 2009 at 1:23 AM, Eric Strain<eric_strain1-/[email protected]>
  wrote:

  >

  >

  > primarily I am trying to duplicate the functionality in windows that

  > notifies the user when the network has limited or no connectivity. I
  want

  > my app to know when the network has limited or no connectivity. Any idea
  how

  > windows detects that condition?

  >

  > -Eric

  >

  > --- On Tue, 8/25/09, Stoyan Damov <[email protected]>
  wrote:

  >

  > From: Stoyan Damov <[email protected]>

  > Subject: Re: [OT] user defined WM_ question: update

  > To: [email protected]

  > Date: Tuesday, August 25, 2009, 2:52 PM

  >

  > You *can't* possibly be thinking that every Windows machine

  > continuously polls all machines on the network to detect if any of

  > them is down.

  > If that's what you're trying to accomplish, develop an app which

  > multicasts heartbeats on a configurable time interval and run it on

  > all machines. Then, on the machine on which you'd like to detect

  > outages, create and run an app which listens for such heartbeats,

  > collects all ips from the heartbeats, and if it detects that an ip

  > hadn't sent a heartbeat in some time interval it notifies the UI.

  >

  > Anything "simpler" sounds like "I need a Delphi component
  which can

  > put a lion in a cage which I can drop on my form"...

  >

  > Cheers

  >

  > On Wed, Aug 26, 2009 at 12:41 AM, Eric Strain<eric_strain1-/[email protected]>
  wrote:

  >>

  >>

  >> Hi Curt,

  >> Thanks for the reply. What I am trying to do is have my application

  >> automatically know as soon as any network failure of any kind
  occurs. This

  >> includes anything from someone unplugging the network cable, to a
  server

  >> on

  >> the network going down for some reason. I'm using MFC with VC6.0

  >> Professional IDE on WinXP. I'm hoping there is an API available and
  that I

  >> don't have to resort to .NET to accomplish what I want. Any ideas?

  >>

  >> -Eric

  >>

  >> --- On Mon, 8/24/09, Curt Hagenlocher <[email protected]>
  wrote:

  >>

  >> From: Curt Hagenlocher <[email protected]>

  >> Subject: Re: [OT] user defined WM_ question: update

  >> To: [email protected]

  >> Date: Monday, August 24, 2009, 4:24 PM

  >>

  >>

  >>

  >> I imagine you still need some kind of listener for the
  "targeted event".

  >> Your listener could then use PostMessage(WM_MYEVENT, 0, 0) to tell
  the UI

  >> thread that the event has happened. You haven't provided any
  specific

  >> information about the "targeted event", though -- for all
  I know, it's got

  >> a

  >> specialized API to do exactly what you want.

  >> On Mon, Aug 24, 2009 at 2:00 PM, Eric Strain <eric_strain1-/[email protected]>

  >> wrote:

  >>>

  >>>

  >>> OK, I got the WM_USER code to work, now is it possible to get
  the event

  >>> handler to fire automatically? I really don't want to use
  polling, even

  >>> if

  >>> it is on a separate thread. Currently I have the WM_USER event
  being

  >>> triggered through SendMessage(WM_MYEVENT,0,0); inside an
  OnClicked( )

  >>> handler attached to a UI button. Although this is working in my
  test app,

  >>> I

  >>> want the event to be fired automatically by the OS when the
  targeted

  >>> event

  >>> occurs.

  >>>

  >>> Any ideas? Thanks guys.

  >>>

  >>> -Eric

  >>>

  >>> --- On Sun, 8/23/09, Eric Strain <eric_strain1-/[email protected]>
  wrote:

  >>>

  >>> From: Eric Strain <eric_strain1-/[email protected]>

  >>> Subject: [OT] user defined WM_ question

  >>> To: [email protected]

  >>> Date: Sunday, August 23, 2009, 5:17 PM

  >>>

  >>>

  >>>

  >>> Hi All,

  >>> I have a function that I need to fire when a specific event
  occurs. The

  >>> event that I need to trap is a network failure of any kind. I
  have the

  >>> code

  >>> that detects when a network failure has occurred but at present
  the

  >>> function

  >>> is inside a command line interface program and I want to
  transfer that

  >>> function into an MFC app and have the function activated by a
  WM_ event.

  >>> My

  >>> question is, is it possible to get the user defined WM_ to fire

  >>> automatically, or does the user have to send the event message
  manually,

  >>> such as by clicking a UI button or something?

  >>>

  >>> Also, I considered using WM_USER to define the custom WM_
  message, but my

  >>> research indicates that WM_APP is the preferred method for
  defining a

  >>> custom

  >>> message. Any thoughts on this? Even better, any concrete
  examples? ; )

  >>> I've

  >>> looked all over the net and through my library of books with no
  luck.

  >>> It's a

  >>> shame a person can't loose weight by running in circles, because
  I seem

  >>> to

  >>> be getting nowhere fast. Thanks guys.

  >>>

  >>> -Eric

  >>>

  >>>

  >>>

  >>>

  >>>

  >>>

  >>

  >>

  >>

  >>

  >>

  >

  >

  > ------------------------------------

  >

  > Yahoo! Groups Links

  >

  >

  >

  >

  > 

  

  

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