C / C++ / MFC

29-Mar-08 0:54

Hello everyone,

What I am confused is about,

http://www.gotw.ca/gotw/059.htm

--------------------
Indeed, often the best way to implement the Pimpl idiom is exactly as shown in Example 4 above, by using a pointer (in order to take advantage of nonthrowing operations) while still wrapping the dynamic resource safely in an auto_ptr manager object. Just remember that now your object must provide its own copy construction and assignment with the right semantics for the auto_ptr member, or disable them if copy construction and assignment don't make sense for the class.
--------------------

1. What means "the right semantics for the auto_ptr member"?

2. "disable" means for the class, copy construction and assignment are not needed? Curious. Never thought of a class which does not need that two basic functions. Smile | :)

thanks in advance,
George

CPallini30-Mar-08 2:55

CPallini

30-Mar-08 2:55

George_George wrote:
1. What means "the right semantics for the auto_ptr member"?

Right semantics means: "a copy constructor and a assignment operator that make sense for that class", I think. Maybe a deep member copy, maybe different.

George_George wrote:
2. "disable" means for the class, copy construction and assignment are not needed? Curious. Never thought of a class which does not need that two basic functions.

For instance a Singleton.

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

George_George30-Mar-08 19:03

30-Mar-08 19:03

Hi CPallini,

I lost your context, "maybe different" is different for what? Any more descriptions?

regards,
George

CPallini30-Mar-08 21:24

CPallini

30-Mar-08 21:24

Well, suppose, for instance, you design a rather complex class (maybe a graphic tool). The class may cache some info to speed up computations. The cached info is part of class internal data but it isn't independent info and should be skipped by assignment operator.
Smile | :)

George_George30-Mar-08 22:19

regarding Visual Studio 2005

30-Mar-08 22:19

Thanks CPallini,

Question answered.

regards,
George

rowdy_vc++29-Mar-08 0:28

rowdy_vc++

29-Mar-08 0:28

hi

I have one source code (it was developed visual studio .NET 2003) but i have only VS2005 but visual studio 2005 does not compiling this source code why?
how to solve this problem?

*****THANKS N ADVANCE****
Mathen.K
(I WILL TRY MY LEVEL BEST )

Re: regarding Visual Studio 2005

rp_suman29-Mar-08 1:48

Re: regarding Visual Studio 2005

29-Mar-08 1:48

Hi,

Refer this article: Upgrade Projects from Previous Versions of Visual C++[^]

Best Regards,
Suman

--
"Programming is an art that fights back!"

Mark Salsbery29-Mar-08 7:05

Mark Salsbery

29-Mar-08 7:05

If you still have trouble after reviewing the migration documentation, please
post the errors you''re seeing - verbatim! It's much easier to help that way Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Problem with wndTopMost in Vista

creatman28-Mar-08 23:35

creatman

28-Mar-08 23:35

Hi!

I have a problem with TopMost window on Windows Vista.
In Dialog's OnInitDialog method I try to set position by the following code

<br />
<br />
    int cx, cy; <br />
    HDC dc = ::GetDC(NULL); <br />
    cx = GetDeviceCaps(dc,HORZRES) + <br />
        GetSystemMetrics(SM_CXBORDER); <br />
    cy = GetDeviceCaps(dc,VERTRES) +<br />
        GetSystemMetrics(SM_CYBORDER); <br />
    ::ReleaseDC(0,dc); <br />
<br />
//Put window on top and expand it to fill screen<br />
	SetWindowPos(&wndTopMost, <br />
        -(GetSystemMetrics(SM_CXBORDER) + 2), <br />
        -(GetSystemMetrics(SM_CYBORDER) + 2), <br />
        cx+5,cy+5, 0); <br />

that works fine in XP - dialog is realy top most, but on Vista sometimes it is not - some active windows like Firefox can be above of my dialog. I can't understand where is the problem here and how can it be fixed?

Re: Problem with wndTopMost in Vista

rowdy_vc++29-Mar-08 1:31

rowdy_vc++

29-Mar-08 1:31

hi i need some extra explains from u ..

1. What's the error u get it from Windows vista?

2. Which type of compiler u used like VS2005 r some thing..?

give the answer for above questions..

and also try install service pack for windows vista and then u compile it

i think it's may be working fine .
Actually windows vista is one of the poor OS in this world ..but we ll try our level best!!

*****THANKS N ADVANCE****
Mathen.K
(I WILL TRY MY LEVEL BEST )

Re: Problem with wndTopMost in Vista

creatman29-Mar-08 7:28

creatman

29-Mar-08 7:28

hi, thanks for answer.

1. I did not get any visual errors, I've got only strange behavior of the windows on screen. I set for my window TOPMOST order, but in OS it actually appears under any current active window on the screen.

2. I use VC2005.

I found some interesting topic on this problem: http://groups.google.com/group/microsoft.public.vc.mfc/browse_thread/thread/8c9333777d461126/c5ee093565701048[^]

What's the newest Platform SDK VC6 can use under Windows XP? [modified]

followait28-Mar-08 23:03

followait

28-Mar-08 23:03

and develop applications for Windows XP?

I've used Windows XP SP2 Platform SDK for several months, there are some incomptible problem, like CFileDialog crashing.

I wonder if there is a more compatible one.
What about Windows Server 2003 R2 Platform SDK?

Thanks.

modified on Saturday, March 29, 2008 5:48 AM

Re: What's the newest Platform SDK VC6 can use under Windows XP?

Randor 30-Mar-08 16:40

Randor

30-Mar-08 16:40

Windows Server 2003 R2 Platform SDK February 2003 Edition is the last version compatible with VC6. I cannot tell you if your problems will go away however.

Best Wishes,
-David Delaune

Re: What's the newest Platform SDK VC6 can use under Windows XP?

followait30-Mar-08 18:08

followait

30-Mar-08 18:08

I've tried, CFileDialog still crashes.

Thanks all the same.

about DLL

rowdy_vc++28-Mar-08 22:59

rowdy_vc++

28-Mar-08 22:59

hi
how to create DLL in visual C++?and how to execute it ?give the detail about DLL functionality for VC++?

*****THANKS N ADVANCE****
Mathen.K
(I WILL TRY MY LEVEL BEST )

Re: about DLL

followait28-Mar-08 23:17

followait

28-Mar-08 23:17

For detail, please check 'Programming Applications For Microsoft Windows' by Jeffrey Richter.

Re: about DLL

rp_suman29-Mar-08 0:18

Compile error atlapp.h can not be found

29-Mar-08 0:18

Here you go:

Creating and Using a Dynamic Link Library[^]

Regards,
Suman

Re: about DLL

Moak29-Mar-08 13:33

Moak

29-Mar-08 13:33

Is this a dejavu[^] or are you repeatedly asking the same simple questions instead of using the search?

George_George28-Mar-08 22:16

Re: Compile error atlapp.h can not be found

28-Mar-08 22:16

Hello everyone,

I am compiling the client part program of COM reentrancy problem. Does anyone know what is the problem?

(BTW: server part program can compile, link and register ok.)

I am using MSVC 2008 + x64 Windows Server 2003. Is it because the code is old and in the newest SDK we need some code change to migrate?

http://www.codeproject.com/KB/COM/sta_issues.aspx

1>stdafx.cpp
1>d:\exercises\stareentr\stareentr\client\stdafx.h(16) : fatal error C1083: Cannot open include file: 'atlapp.h': No such file or directory

1>Compiling...
1>client.cpp
1>d:\exercises\stareentr\stareentr\client\client.cpp(4) : fatal error C1083: Cannot open precompiled header file: '.\Debug/client.pch': No such file or directory

thanks in advance,
George

rp_suman29-Mar-08 0:39

Re: Compile error atlapp.h can not be found

29-Mar-08 0:39

Hi,

It seems, problem is only in some project settings.

Check "additional include libraries", linker input etc.

Thanks,
Suman

--
"Programming is an art that fights back!"

George_George29-Mar-08 0:48

Re: Compile error atlapp.h can not be found [modified]

29-Mar-08 0:48

Thanks Suman,

The value for me is, odbc32.lib odbccp32.lib comctl32.lib. But what I met with is compile error, why do you think it deals with linker options? Smile | :)

regards,
George

rp_suman29-Mar-08 1:01

Re: Compile error atlapp.h can not be found

29-Mar-08 1:01

Hi,

I mainly wanted to tell it will be only project settings and not programming error.

I will tell you when I find solution.

Is there use of SetSDKPath() in ur project?

Thanks,
Suman

--
"Programming is an art that fights back!"

modified on Saturday, March 29, 2008 7:07 AM

George_George29-Mar-08 1:10