Re: Need some example of C++ chat application - C / C++ / MFC Discussion Boards

CreateViewObject in a Namespace Extension

Dave Kerr15-Sep-06 7:33

15-Sep-06 7:33

Hi all,

When CreateViewObject is called in my namespace extension I use SHCreateShellFolderView to create a system folder view. However, when the user double clicks on folder whithin this view, CreateViewObject is called again, and a new window pops up- instead of repopulating the old one. I've tried having a single instance of the IShellView from SHCreateShellFolderView and using it each time, but that just means that when the user opens a subfolder, nothing happens..

Any ideas anyone? I'm tearing my hair out over this...

Dave Kerr
codechamber@hotmail.com
http://www.codechamber.com

Giving memory back to the system

nadiric15-Sep-06 7:23

nadiric

15-Sep-06 7:23

I have an app that eats up a bunch of memory with objects (created with "new"), then releases it back to the system (using "delete").

I am monitoring the memory usage with taskmanager, and noticed something strange... the memory does not seem to be given back to the system.

If I minimize the app, the memory is magically recovered by the system, and all is well, even after restoring the app.

Is the memory actually given back, but taskmanager is just out of the loop until the minimize, or is the memory not released until the app is minimized? if so, am I supposed to call some sort of "flush" function to give it back?

Thanks

Re: Giving memory back to the system

C^hris L^osinger15-Sep-06 7:47

C^hris L^osinger

15-Sep-06 7:47

MS's memory manager is greedy. it hangs onto memory you've free'd in anticipation that you might need it again before your program exits. this makes subsequent allocations faster.

image processing | blogging

Re: Giving memory back to the system

David Crow15-Sep-06 8:49

David Crow

15-Sep-06 8:49

nadiric wrote:
...the memory does not seem to be given back to the system.

Right, and this is perfectly normal behavior.

nadiric wrote:
...but taskmanager is just out of the loop...

TM is actually showing you the address space in use. This has nothing to do with the amount of that address space your program is actually using.

"Talent without discipline is like an octopus on roller skates. There's plenty of movement, but you never know if it's going to be forward, backwards, or sideways." - H. Jackson Brown, Jr.

"Judge not by the eye but by the heart." - Native American Proverb

Re: Giving memory back to the system

Rick York15-Sep-06 10:57

Rick York

15-Sep-06 10:57

An occasional call to _heapmin can be helpful.

Need some example of C++ chat application

Yanshof15-Sep-06 6:38

Yanshof

15-Sep-06 6:38

Hello all,

I need to write some application in C++ that act like some chat application. Confused | :confused:

When client connect to the server - the server need to open new thread for the connection.

My main problem is the communication issue ... i don't know a lot about communication programming in C++ and i need to learn how to do it (specially the issue of open thread).

I looking in Google and i don't find anything. Mad | :mad:

Thanks for any help. Rose | [Rose]

Re: Need some example of C++ chat application

Reagan Conservative15-Sep-06 7:03

Reagan Conservative

15-Sep-06 7:03

Why not look at some Java examples? Java is VERY similar to C++. You can probably find classes in VC++ that mimic very closely the classes you'll see in Java.

John P.

Re: Need some example of C++ chat application

Zac Howland15-Sep-06 8:31

Zac Howland

15-Sep-06 8:31

jparken wrote:
Why not look at some Java examples?

I wouldn't even tell an experienced C++ programmer to do this, much less a self-proclaimed beginner. It is easy to have a C++ programmer generate a Java program using C++ as a template, but not the other way around.

jparken wrote:
Java is VERY similar to C++.

Java is very different from C++ in the areas of socket programming and threads. On top of that, both of those areas are OS dependent in C++, whereas Java *tries* to have a standard way for both.

To the OP ... this article should get you started.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Need some example of C++ chat application

Reagan Conservative15-Sep-06 9:32

Reagan Conservative

15-Sep-06 9:32

I'll say this --- it will be much easier for a beginner to use Java for "chat" than C++ any day! The Java IDEs (which are free) put VC++ to shame (at least for VC++ 6.0). And there are numerous books that show you "how to" exactly do something --- unlike the Microsoft stuff that never quite tell you everything you need to know about how to solve a problem. For ease of use, I'll take Java any day of the week!

John P.

Re: Need some example of C++ chat application

Zac Howland15-Sep-06 9:56

Zac Howland

15-Sep-06 9:56

I can argue back on that, but that wasn't the point I was making with my comment. Trying to look at Java code and derive what you would need to do in C++ is not an easy task, and definately should not be recommended to someone who states they are a beginner.

As to your off-topic points:

VC++ (even VC6) was FAR superior to any of the Java IDEs (even the most modern ones) when it comes to certain important features (e.g. debugging). Yes, many of the Java IDE's look prettier and will try to type for you, but more often than not, those things get in the way of development instead of doing what an IDE should do (e.g. help the developer). Granted, there are some things the Java IDEs do better, but as a user of both, I prefer VC over Eclipse or NetBeans anyday. In fact, there are times when Eclipse annoys me so much that I write my Java code using a text editor.

As for books, there are just as many C++ books published (actually more) as there are Java books. Granted, not all of them are terribly useful for beginners, but that can be said for the Java books as well.

Say what you want about Microsoft ... but MSDN (even with its minor hickups) is still FAR more useful than Sun's javadocs which are great at telling you how to call a function, but almost never tell you how to use it.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Need some example of C++ chat application

David Crow15-Sep-06 8:53

David Crow

15-Sep-06 8:53

jparken wrote:
Java is VERY similar to C++.

Only in syntax.

Re: Need some example of C++ chat application

Eric Dahlvang15-Sep-06 7:30

Eric Dahlvang

15-Sep-06 7:30

Tons of stuff here[^]

--EricDV Sig---------
Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
- Laurence J. Peters

Re: Need some example of C++ chat application

ThatsAlok16-Sep-06 1:15

ThatsAlok

16-Sep-06 1:15

Yanshof wrote:
y main problem is the communication issue ... i don't know a lot about communication programming in C++ and i need to learn how to do it (specially the issue of open thread).

http://www.codeproject.com/internet/winsockintro03.asp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: Need some example of C++ chat application

Hamid_RT16-Sep-06 2:29

Hamid_RT

16-Sep-06 2:29

See Simple Chat Program [^]

WhiteSky

Confuse SHFileOperation()

Max++15-Sep-06 6:30

Max++

15-Sep-06 6:30

Please give some example for this function.
I want to delete set of file in "Temp" folder.

Re: Confuse SHFileOperation()

David Crow15-Sep-06 8:54

David Crow

15-Sep-06 8:54

Max++ wrote:
Please give some example for this function.

Have you tried Googling for such?

Visual Studio 2005 Style problem

Cyclone0215-Sep-06 6:23

Cyclone02

15-Sep-06 6:23

Hi guys
I have been trying to compile an app in Visual Studio 2005(its a c++ app) but every time i run the proggy after compiling it, it looks like this:

After Compiling: Click Me[^]

although when i click on the Test Dialog button in Visual Studio 2005 it shows the apps layout like this:

Using Test Dialog: Click Me[^]

I started the project in Visual Studio 2005 and the first time when i compiled the app after adding just a simple button ,nothing else, it worked and my app was compiled in the VS2005 format although after adding som functions and stuff it compiled in Visual C++ 6 format!

Visual Studio 2005 Format: Click Me[^]

Visual C++ 6 Format: Click Me[^]

Now my problem is that i want the program to compile and have the style that it has when u click on Test Dialog. Like this:

I want the app to compile and look like this:Click Here[^]

Could someone please help me with this problem?

Thanks

IE Extension: How to add a button to the status bar?

rryyjw15-Sep-06 6:06

rryyjw

15-Sep-06 6:06

Have you ever tried Google Notebook? After install the software, it will add a button at the bottom-right corner of IE. Dose anybody know how to implement that ? Any reply is appreciated.

Thanks
R.Y.J

Re: IE Extension: How to add a button to the status bar?

Guffa15-Sep-06 15:57

Guffa

15-Sep-06 15:57

Please don't cross post.

---
b { font-weight: normal; }

Re: IE Extension: How to add a button to the status bar?

ThatsAlok16-Sep-06 1:15

ThatsAlok

16-Sep-06 1:15

rryyjw wrote:
will add a button at the bottom-right corner of IE. Dose anybody know how to implement that ? Any reply is appreciated.

thats done by hooking, there are tons of article here at codeproject.. try WinPin!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Toolbar over 2 rows ?

RedDragon2k15-Sep-06 5:11

RedDragon2k

15-Sep-06 5:11

Hello,

I have a vertical left aligned toolbar, but I contains quite a few buttons so I would like to split it into to rows. Is this possible ?

Thanks,
Ben

DLL link error

kk_vp15-Sep-06 5:03

kk_vp

15-Sep-06 5:03

Hi,

I have a DLL built in VS 2005 and an application built in VS 2005.
when I use release version of lib, I get link errors.

I am statically linking .lib in app project.

release APP - debug lib -> OK
release APP - release lib - Link error

what could be the issue ??? D'Oh! | :doh:

- KK

Re: DLL link error

C^hris L^osinger15-Sep-06 5:13

C^hris L^osinger

15-Sep-06 5:13

kk_vp wrote:
link errors

what are the errors ??

image processing | blogging

Re: DLL link error

kk_vp17-Sep-06 19:29

kk_vp

17-Sep-06 19:29

The error is
error LNK2001: unresolved external symbol __imp__<api name="">

I think this is the same error we get if the .lib could not be linked.

If I use the debug version of .lib, it links without any error.

- KK

Re: DLL link error

kk_vp18-Sep-06 4:16

kk_vp

18-Sep-06 4:16

I got it solved!
In calling convention (Project settings->c++->advanced)
I had __stdcall (/Gz) which should have been __cdecl (/Gd)

changed it and got it working !

- KK

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