Re: user defined WM_ question: update

> Hopefully. <sigh>

I wouldn't be able to sleep unless I checked the source -- it does.
<whew>

-S

On Wed, Aug 26, 2009 at 2:39 PM, Shawn A. Van Ness <[email protected]>wrote:

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