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Hi,
I've implemented a named pipes server according to microsoft's KB: http://msdn.microsoft.com/en-us/library/aa365588(VS.85).aspx[^]
so far so good ..
the next step was to add timeouts handling. i.e in case the server failed, the connected clients should NOT be blocked and should exit with timouts.
according to the documentations, this should be done using the following procedure:
1. create a file:
m_hPipe = CreateFileA(
m_sPipeName, // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
0, // default attributes
NULL); // no template file
.
2. set timeouts and Setup com:
GetCommTimeouts(m_hPipe,&m_comm_timeout);
m_comm_timeout.ReadIntervalTimeout = MAXDWORD;
m_comm_timeout.ReadTotalTimeoutMultiplier = MAXDWORD;
m_comm_timeout.ReadTotalTimeoutConstant = 1;
SetupComm(m_hPipe, BUFSIZE+3,BUFSIZE+3);
DCB cDCB;
GetCommState(m_hPipe, &cDCB);
SetCommState(m_hPipe, &cDCB);
SetCommTimeouts(m_hPipe, &m_comm_timeout);
3. execute the read file command ...
fSuccess = ReadFile( m_hPipe, // pipe handle
chBuf, // buffer to receive reply
BUFSIZE, // size of buffer
&cbRead,// number of bytes read
NULL); // not overlapped
the above procedure should cause the ReadFile to exit after 100 miliseconds, however, it doesnt seems to work
Any suggestions will be wellcomed ...
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I haven't used pipes for a while, but I'm quite certain that the ...Comm... functions only operates on communication devices such as serial COM or parallel ports.
The DCB struct in particular has members that sets baudrate, parity and such, which doesn't make sense on pipes.
If you check the return values of those functions I'm pretty sure they will all return FALSE.
Open the pipe in overlapped mode instead. That will give you the possibility to do other things than just waiting on a blocking read request.
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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Hi Masters!
--------------
Could you please tell me what's a Message Only Window and how can I
create one using Pure Win32 APIs?
Thank you in advance ... 
Thank you masters!
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A Message Only Window is typically a window that you create that is kept invisible and does not receive any user input. Its sole purpose is to receive window messages.
You can use the CreateWindow(...) function to create just about any window that you would ever need.
BTW - I think that there is a special style available in later versions of the Win32 SDK for message-only windows, but I cannot find it now.
Peace!
-=- James Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles
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I need some help interpreting the Spy++ listing of window items...
In the listing of windows, handle values (in HEX), short description, ... all listing in a tree view, is the ordering within a group meaningful?
Let me clarify my question:
I am debugging a huge GUI application and the past developer created most of the buttons on the GUI dynamically (on the fly) using bitmap images and the CButton::CREATE() method(s).
I am using Spy++ to identify some buttons.
If I am looking at the listing of window handles in Spy++, does the order listed reflect the order in which the buttons were created?
I am trying to find a run-away button that is in a place it shouldn't be on the GUI and not controlled (hidden/enabled) when it should be.
Thanks!
John John
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I am working on a program that takes an input of 2 numbers from the user, checks the primality, generates a public and private keys, validates those keys by encrypting text entered by the user and decrypting text entered by the user. Can anyone help me with some code for this project?
Thanks!
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Hi
I am looking at someone elses project and source code and seeing something I need explaining!
There is a STATIC member function declared in a class.
eg.
class myClass
{
static void myFunction();
}
Then it is called using the scope resolution opperator.
myClass::myFunction()
but it is being called from another source file in the project!
I can't see any reason why it is aloud to do this. In fact I have added my own class and function
looking exactly the same and it gives me LNK 2019 error.
Any Ideas what I am missing.
Thanks in advance for your time. 
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steph5 wrote: it is being called from another source file in the project!
I can't see any reason why it is aloud to do this.
If it wasn't allowed, then all our source code would
have to be in one file. Thankfully we have a linker
to link separate compiled code modules 
steph5 wrote: In fact I have added my own class and function
looking exactly the same and it gives me LNK 2019 error.
To do its job, the linker needs to know where to find
the code to link to. What's the complete error you're getting?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Mark Salsbery wrote: If it wasn't allowed
shouldn't it be: "if it weren't allowed" ? 
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 Probably.
I'm a software engineer, dammit, not an English professor.
Mark Salsbery
Microsoft MVP - Visual C++
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f*ck that, i'm french, not a native english speaker (like you) ! lol
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toxcct wrote: not a native english speaker (like you)
LOL! I'm pretty sure the rest of the world doesn't
call what we Americans speak "English" 
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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touché 
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Not necessarily.
"Love people and use things, not love things and use people." - Unknown
"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch
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Now that DavidCrow mentions it, and the caffeine is kicking in...
I'm pretty sure I was right
LMAO
Mark Salsbery
Microsoft MVP - Visual C++
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Nope.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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you're saying this as if such construction never exists... but I'm sure it is !
for example, the following is perfectly valid : "If I were you, I wouldn't do that"...
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Mark, wait.
I didn't say all I write is gramatically correct; I make mistakes sometimes.
BUT, isn't the construction I just asked you in this thread valid ?
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I'm just goofin with you here, of course.
toxcct wrote: isn't the construction I just asked you in this thread valid ?
Where at? I missed something somewhere 
Mark Salsbery
Microsoft MVP - Visual C++
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I see it now sorry
Yeah you are right I think. The more I say both versions, yours sounds better.
And using "was" implies past tense which seems silly.
![Beer | [beer]](https://www.codeproject.com/script/Forums/Images/beer.gif)
Mark Salsbery
Microsoft MVP - Visual C++
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And you're right [^]. Anyway it looks like 'wish' is needed in the sentence.
Anyway I'm a poor Italian man...
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Hi
I was in the understanding that if you declare a static function it can only be called from the source file where it is declared.
Am I missing something??
The error says "unresolved external symbol"
the call to the function is in file1.cpp where I have:
myClass::myFunction(variable1, variable2);
In myClass.h I have:
class myClass
{
static void myFunction
}
and in myClass.cpp I have the function definition:
myClass::myFunction()
{
//function definition
}
I can't call myFunction from file1.cpp
As you can tell I am a novice programmer and in desperate need of explanation 
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