Re: user defined WM_ question: update

Yeah, IsDestinationReachable was a pretty horrible idea for a platform API.
No reliable way to make that work.

So I guess we deprecated that one for Vista.

Hopefully the docs are a mistake and it still returns FALSE -- then
GetLastError() would return ERROR_CALL_NOT_IMPLEMENTED.

Hopefully.  <sigh>

-S


On Wed, Aug 26, 2009 at 2:14 PM, Stoyan Damov <[email protected]>wrote:

> Ahahahahaha, Shawn, I'm laughing my ass off!!!!!!! Take a look at the
> SENS's IsDestinationReachable's return values:
>
> BOOL IsDestinationReachable(
>  __in     LPCSTR lpszDestination,
>  __inout  LPQOCINFO lpQOCInfo
> );
>
> Return Value
>
> Return code     Description
> TRUE
> A destination can be reached.
> FALSE
> A destination cannot be reached. To get extended error information,
> call GetLastError.
> ERROR_CALL_NOT_IMPLEMENTED
> This function is not available on Windows Vista.
>
> That's gotta be TROOL, not BOOL :)))))
>
> Cheers
>
> On Thu, Aug 27, 2009 at 12:07 AM, Shawn A. Van Ness<[email protected]>
> wrote:
> >
> >
> > This is what SENS (system event notification service) is for.
> > http://msdn.microsoft.com/en-us/library/aa376627.aspx
> >
> > There's also NLA (network location awareness) which offers some
> ioctl-based
> > notification mechanism...  probably also something in WMI...  probably 3
> > more ways this is exposed that I don't even know about.
> >
> > -S
> >
> > On Tue, Aug 25, 2009 at 3:49 PM, Eric Strain <eric_strain1-/[email protected]>
> wrote:
> >>
> >>
> >>   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
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
> >>
> >> ------------------------------------
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>