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I can not understand, how it can be possible,
if you have placed #include "..\HeaderOfTab.h" correctly... 
(OK, I will read your link, thank you !)
For example: I have implemented the following stage  :
TOOLDLL <- EDITDLL <- APPEXE -> TOOLDLLvirtual void BeHappy() = 0;
modified on Tuesday, March 16, 2010 10:55 AM
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Eugen Podsypalnikov wrote: For example: I have implemented the following stage Smile :
TOOLDLL <- EDITDLL <- APPEXE -> TOOLDLL
I believe that what Vaclav_Sal was trying was more like:
----------<---------
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EDITDLL <- APPEXE -> TOOLDLL
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---------->---------
In other words, he wasn't linking one DLL to the other, but was trying to have them use each other by virtue of his knowing that they were both being used by the same exe.Please do not read this signature.
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I'm not sure about your design here. A library provides services to the program that uses it. in general, a dll will not know about, or be able to use anything from a "sibling" dll. I would suggest reconsidering your partitioning into modules so that this is not necessary and you have better encapsulation. Try for independent, service providing modules. If this is not possible, than perhaps these groupings really shouldn't be dlls.
Not necessarily a recommendation, but an alternative might be to make them static libraries.
If this is really necessary, then you could have the first dll dynamically link to the second. (Only one way - I don't really think you want circular references.)
Under some circumstances you might do something with callbacks or passing in a object.Please do not read this signature.
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Thanks Avi.
I think my "problem" is that I am looking at it from user , mechanical , point of view.
The DLL s are "placeholders" for property sheets.
I have a main property sheet with secondary property sheet underneath.
In plain talk - I have a tab control with sub-tabs.
I would like to keep them in separate DLL , and so far they are.
But I am trying to link them because that is the way it looks to the user.
This is where I am wrong, and I need to rebuild it so they are just accessible from the main application only. They are both “connected” to the document anyway and need to communicate only with the document.
Avi , I appreciate your comments, you made me think about my wrong way of approaching this.
You are very helpful.
Thanks
Vaclav
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You're welcome. Thank you for that link in your post to Eugen Podsypalnikov. I didn't know about that possibility.
Vaclav_Sal wrote: They are both “connected” to the document anyway and need to communicate only with the document.
Sounds good to me. Being somewhat simple minded  , I prefer to keep things as simple and straightforward as possible. Keep in mind that you will also have to maintain what you create. I've found that locating a problem when data flow is passing between 8 components, as it does in some software I get to maintain, can sometimes be interesting.
Another approach you might consider if you have to notify other windows of some action, but the document's UpdateAllViews() isn't appropriate, is to play "chain of command". Implement a custom message that is sent to the parent window for handling or rebroadcast to siblings of the originator. I've done this with mix-in classes for splitter windows to keep the panes in sync. This has let me reuse views on different tab pages with different - or no - siblings.
Oh, I just noticed your reference to VC++ version 6. Are you aware that the dialect of C++ used in 6.0 is non-standard? You might want to consider shifting your development to a later version that is more standard conforming.
Good luck.Please do not read this signature.
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Hi,
I'm having a small issue with associating the extension of my files with my application.
I'm wanting to use a 2 character extension for my files.
Is this inherently wrong, or should it associate?
My resource string is as follows and seems to be ok
IDR_MAINFRAME "Ext File\nFile\nExt\nInstall Files (*.a1)\n.a1\NewFile.Document\nNewFile Document"
Any ideas?
Tony
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What's the problem?"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius
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Hi David,
When double clicking on a file with a ".a1" extension it doesnt launch my application. I'm assuming therfore that it isnt associated with my application. It also does not display the application icon, which I understood it should.
My complete code, for what it's worth, to load the SingleDocTemplate is as follows
CSingleDocTemplate* pDocTemplate = new CSingleDocTemplate(IDR_MAINFRAME,
RUNTIME_CLASS(CProgDoc),
RUNTIME_CLASS(CMainFrame),
RUNTIME_CLASS(CProgView));
AddDocTemplate(pDocTemplate);
IDR_MAINFRAME is as per the original post
Thanks
Tony
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maycockt wrote: When double clicking on a file with a ".a1" extension it doesnt launch my application.
Does HKEY_CLASSES_ROOT\.a1 exist in the registry? If so, does it have a default value?"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius
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maycockt wrote: IDR_MAINFRAME "Ext File\nFile\nExt\nInstall Files (*.a1)\n.a1\NewFile.Document\nNewFile Document"
isn't it assocaited? "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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OK, problem partially solved.
I added RegisterShellFileTypes after my AddDocTemplate(), but the assocation is shown with a small sized icon, not the standard size icon you would expect to see if you were viewing a file list with "details" selected from Windows Explorer.
How can I affect the associated icon?
TIA
Tony
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Check the icon file that you are using. It does not/should not contain just one image. It should contain multiple versions with different color depths and sizes. (You may have to look around in your icon editor to see how to move between these versions.)
You may be missing a needed size/color depth version, so Windows is trying to make due with something else. For some more information see here[^] and here[^].Please do not read this signature.
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i want to read data from a wav file and then i want to use fft on that data in c.is there any method plz help and guide me.
thanks
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Well, at lest the WAV file format is documented [^].
 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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Hello,
I have to add some blank spaces at the end of line.
How to add blank spaces at end of line while file writing?
Which file class i have to use CFile or CStdioFile?
for e.g.
suppose i have to write string
"Hello, how are you "
I have to add 10 space after the word "you".Abhijit
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CStdioFile::WriteString("Hello how are you ");
10 spaces after 'you'; I don't understand what your difficulty is with this. Please try and clarify what you are trying to do.txtspeak is the realm of 9 year old children, not developers. Christian Graus
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If you're going to read and write on a line by line basis, then use CStdioFile. It exists for this purpose.
And what's your problem writing 10 spaces? Write it like you would write normal characters.
“Follow your bliss.” – Joseph Campbell
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Hi There,
You could do this in one or more ways.
One way is to us the \t escape routine. Which works a little like this:
Somefile << "Some text to write to file\t";
That would add one tab space after the word file. So you could add a couple of \t escapes.
or use formatting functions instead. one example thereof is:
printf ("Width trick: %*d \n", 5, 10);
You would just have to figure out which is best for you.
Though printf() is routed to the console by default, you could use it or its counterparts to route to a file
object instead.
Hope this helps
Louis
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Hi All,
I am using VS2005. In my application i am finding a window and enumerating its childs. Now i need to send messages to each one. I have tried to send WM_COMMAND, WM_CLOSE, etc..I have a doubt regarding sending keystroke messages to a window.
How to Send the Combination Key "Ctrl + P" to a window.
Please give your valuable suggestions...
Regards,
Spk
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you have to something like this
WM_KEYDOWN -Send CTRL
WM_KEYDOWN - SEND P
WM_KEYUP-SEND P
WM_KEYUP- Send Ctrl "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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Besides what Alok suggested, there's also SendInput()[^]
“Follow your bliss.” – Joseph Campbell
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S p k 521 wrote: Please give your valuable suggestions...
Have you tried keybd_event()?"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius
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I have referred to chapter 20 of "teach yourself vc++ + in 21 days by sams " for socket programming using CAsyncSocket class.
I need to understand & implement if the physical connectivity is available or not if "send" command is send. Below is the code snippet.
CString m_strMessage="S";
m_strMessage=m_strMessage+'\x00A';
int iLen = m_strMessage.GetLength();
// Send the message
int iSent = m_sConnectSocket.Send(LPCTSTR(m_strMessage), iLen);
if (iSent == SOCKET_ERROR)
{
AfxMessageBox("Socket Error");
}
else
{
// Sync the variables with the controls
}
It was observed that iSent does not give "SOCKET ERROR" even though Ethernet connection is not available. I need to indicate the user that there is some socket error problem.
I have tried adding below lines of code before send command. But still it does not return correct error code & indicate that the socket connection is not available.
int conn_stat,last_error;
conn_stat= m_sConnectSocket.Connect(m_strName,m_iPort);
last_error= CAsyncSocket::GetLastError();
The last_error remains 0 even if Ethernet cable is removed. Shall I use a timer feature & keep checking if the connection is available or not. If yes, could you help me in achieving this?
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If I'm right you will not get an error because the message was delivered to your networkcard. So create a timer (see Settimer()/Killtimer()) and reset it everytime something is coming in from the server. When the timeout comes close your socket gracefully.
Note: It could be handy to look for the asynchrone versions for sockets. In basis you list all sockets events you are interrested in to a window (see Windows API WSAAsyncSelect()) and it will send you window-messages when that event is actual. With this you will get a window-message stating for example your socket is ready to send...
Good luck
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diptipanchal wrote:
The last_error remains 0 even if Ethernet cable is removed. Shall I use a timer feature & keep checking if the connection is available or not. If yes, could you help me in achieving this?
A TCP socket will not return an error immediately if a network connection is going down. This is by design, if there is a short network outage the connection can recover... on the other side it takes a couple of minutes until an interrupted connection is reported back to the socket (and will be closed with an error).
You can do two things to detect an interrupted connection, such as a removed Ethernet cable:
1) Implement a reasonable fast heartbeat. If peer A wants to know about the status/availability of peer B, it either has to receive a "message" from B in regular intervals (and therfor knows that peer B is alive) -or- when there is no regular traffic to piggyback the heartbeat then one of the peers has to initiate (additional) heartbeats in reasonable intervals. For example an IRC server uses regular ping/pong messages every few minutes to find out about the connection status of its chat clients.
2) Use the IP Helper API[^] to check if your local network interfaces are down.
Hope it helps!
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