Re: Scroll bars in CWnd derived classes - C / C++ / MFC Discussion Boards

ThatsAlok7-Jul-05 0:17

7-Jul-05 0:17

micutzu wrote:
debug the release version - where I can see only the assembly code

I Believe, Only this article can help you :-
http://www.codeproject.com/debug/survivereleasever.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

Re: User Breakpoint called from code

micutzu7-Jul-05 0:34

micutzu

7-Jul-05 0:34

Thank you. I will read the article and maybe find the cause of the problem.

Re: User Breakpoint called from code

Ravi Bhavnani7-Jul-05 10:40

Ravi Bhavnani

7-Jul-05 10:40

You may want to use PJN's excellent CExceptionLogger[^] to identify problems in release builds. I've used it with great success in the past - it's a real lifesaver!

Caveat: for accurate identification of problematic code, you'll need to disable optimization.

/ravi

My new year's resolution: 2048 x 1536
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Re: User Breakpoint called from code

Blake V. Miller7-Jul-05 16:41

Blake V. Miller

7-Jul-05 16:41

I do debug the release version - where I can see only the assembly code. The debug version never crushes - since as far as I know the debug version does handle a little bit diffrent the events.

You have probably heard this a million times, but one of the first things to check when your releasse crashes and debug does NOT is to search for the use of uninitialized variables - especially ANYTHING that is a pointer. Maybe you can set your compiler to warning level 4 (if you have not done so already), and if you thought the 'use of X before it has been initialized' was just warning, then you should treat all of those as errors.

Re: User Breakpoint called from code

Anonimous010121-Sep-05 22:35

Anonimous0101

21-Sep-05 22:35

Hello,
dou you resolve your problem? i have the same! every times when the destructor from CString is called or = operator i recive the same error!!
Example:
CString csString;

csString = "www.codeproject.com"; // ok, no problem

next iterator,
now ist in csString something like this:"îþîþîþîþîþîþîþîîþîþîþîþîþîþîþîîþîþîþîþîþîþîþîîþîþî" ???
whats this???
when i try to add a new value to csString to overwrite him com's a problem:
csString = "myString"; // problem here
or
csString = ""; // problem to!

in dissasembly is:
004030A5 call CString::operator= (0040956e) // in this line brak the programm??

any idea how to use this CString?

regards
mirso

Re: User Breakpoint called from code

micutzu21-Sep-05 22:45

micutzu

21-Sep-05 22:45

Hello,

Well - I was not able to solve the problem ... but I had developed a work around which I think is the solution is your case as well.

You are using CString - which is very easy to use. Try LPSTR.

Regards,

Dan.

Scroll bars in CWnd derived classes

lfrequency6-Jul-05 22:02

lfrequency

6-Jul-05 22:02

Hey all,

I've got an application running the XP Style interface where the scroll bars are nicely shaded, buttons are highlighted, etc. However, in any CWnd derived class, if I call ShowScrollBar(), the scroll bar will still look like the old pre-XP style scroll bar. However, this problem does not happen in common MFC classes like CScrollView or CListCtrl - only my own CWnd classes. It looks horrible when the rest of my app is in the XP style look. Any suggestions?

To reproduce the problem, I think all one needs to do is create a new CWnd somewhere and call ShowScrollBar(). It will sport the old look, rather than the new XP look.

EDIT: I solved this problem. If anyone is interested, such behavior occurs when ShowScrollBar() is called before SetScrollRange() or SetScrollInfo() is called to set up the non-client scrollers.

Re: Scroll bars in CWnd derived classes

Budric B.7-Jul-05 4:00

Budric B.

7-Jul-05 4:00

Do you find that if you call SetScrollInfo and specify the nPage size in the structure to resize the thum, the scroll bar doesn't scroll all the way to the max value?

I can't find the correct way to fix this other than changing the max value.

CFileDiaolg:problem with order of files and folders

kaifred6-Jul-05 21:35

kaifred

6-Jul-05 21:35

Hello there,
I have a problem with the order of how folders and files are listed when I use CFileDialog-class.
Normally when calling the box, it first lists all folders then all files (in alphabetic order).

For some days now the order is reversed. So first all the files THEN all the folders. I can change the order each time with help of the "options" button (==> Show Details ==> then click on "Name") but I have to do that each time I use the CFileDialog in my program.

Actually the same thing already happens in only AOME of my windows programs (e.g. in Netscape yes but in Word not...)

Anybody any idea?? Any help or hint is appreciated!

Kai

Kai

How do you create a library....

Steve Messer6-Jul-05 21:32

Steve Messer

6-Jul-05 21:32

I have some utility functions that I would like to put into a library. I want the library to be used like you would for example the cos(x) function from the math library.

All you have to do is include the header

#include <math.h>

Then you can use the function

float result = cos(somenum);

How do you accomplish this?

Re: How do you create a library....

Stlan6-Jul-05 22:47

Stlan

6-Jul-05 22:47

Create a static library project containing your utility functions (menu File->New->Project, choose Visual C++ Projects, then select the template Win32 Project. Finally in the wizard, select the Static Library option). Once compiled your will get one .h and one .lib file, which you can include within your other projects.

Re: How do you create a library....

Steve Messer7-Jul-05 6:45

Steve Messer

7-Jul-05 6:45

Thanks for the response. I will try that once I get a moment.

Will I need to extern "C" the functions or anything else special?

Re: How do you create a library....

Andy Moore7-Jul-05 7:20

Andy Moore

7-Jul-05 7:20

To make a utility function in a library available for use, you need something like the following in your .h file:

extern "C"
{
    declspec(dllexport) void MyFunc(int i);
}

Human beings were not meant to sit in little cubicles staring at computer screens all day, filling out useless forms and listening to eight different bosses drone on about about mission statements. -- Peter Gibbons

Re: How do you create a library....

Steve Messer7-Jul-05 11:58

Steve Messer

7-Jul-05 11:58

Thanks

How to power on a computer?

dSolariuM6-Jul-05 21:28

dSolariuM

6-Jul-05 21:28

Hi,
I want to know how can I power on a computer in a network?
Cheers,
Thanks.

Re: How to power on a computer?

ThatsAlok6-Jul-05 23:07

ThatsAlok

6-Jul-05 23:07

search WAKE ON LAN on google Smile | :)

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

cheers,
Alok Gupta

CTabCtrl and Scrolling

Azghar Hussain6-Jul-05 21:17

Azghar Hussain

6-Jul-05 21:17

Imagine a situation in which Dialog Box added to TabCtrl is bigger. Than I think TabCtrl should provide a scrollbar. But I am not getting any ScrollBar. So what might be the problem. Is it by default or I have to set some properties.
Thanks

If you have faith in the cause and
the means and in God, the hot
Sun will be cool for you.

Re: CTabCtrl and Scrolling

ThatsAlok7-Jul-05 0:10

ThatsAlok

7-Jul-05 0:10

Bahadur - yar - Jung wrote:
hich Dialog Box added to TabCtrl is bigger. Than I think TabCtrl should provide a scrollbar.

Yeap It is Default, TabCtrl resize dialog box according to it size .

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

cheers,
Alok Gupta

Re: CTabCtrl and Scrolling

Azghar Hussain7-Jul-05 0:54

Azghar Hussain

7-Jul-05 0:54

Thanks for replyieng.
I tried a simple sample program and I am not able to see both horizontle and verticle scrollbars. I mean they are not visible by default. Do I need to enable certain properties ?
Thanks again.

If you have faith in the cause and
the means and in God, the hot
Sun will be cool for you.

approach to develope gave server application ?

manxx6-Jul-05 21:09

manxx

6-Jul-05 21:09

ok ! could some one quide in this :- we have game project where each room is currently run by running the same game server application for each room , in other words for multiple rooms multiple instances of same game server exe are run . Because threads are not used it takes more memory if we need to run large number of rooms by running the same server exe number of time equlal to the rooms .
The current application is developed in a single dialogue box which has all the code and which manages the sockets . now we need to make whole thing in single game server application using threads to run numtiple rooms within . so can some one tell that , can we use the current version and us it into new appication and have it run the same code into new threads to add new room each time and will we need to make the application communicate from one main port or can we have the old code run in new thread and let it open an unique port for ecah room .

What would be a right approach to making such an application which can run 500 such rooms in other words 10000 concurrent users as each room have 10 live players .

Source Code creating Static Control at RunTime

a_david1236-Jul-05 21:08

a_david123

6-Jul-05 21:08

Respected Dears

How i can write code for Static text control at run time.

david

Re: Source Code creating Static Control at RunTime

Stlan6-Jul-05 22:34

Stlan

6-Jul-05 22:34

Assuming you are using MFC:
- Add CStatic *m_pMyStatic as member of your CWnd(-derived) object
- When it is required, create the control:

m_pMyStatic = new CStatic;
m_pMyStatic->Create(...);
m_pMyStatic->SetWindowPos(...);
etc.

- Don't forget to delete the control when it is no longer needed (for instance in the destructor):

delete m_pMyStatic;

Please help me!

dSolariuM6-Jul-05 21:08

dSolariuM

6-Jul-05 21:08

Hello,
There is an exe that:
1.I want to send this file to a client from server but that client haven't the client program.How?
2.How to run (Install) this file?

Cheers,
Thanks.

Source Code creating Static Control at RunTime

a_david1236-Jul-05 21:05

a_david123

6-Jul-05 21:05

Respected All
Regards!
How i can write Code for Creating STATIC TEXT control at RunTime.

best wishes

david

Run-Time Check Failure #2 [edited]

toxcct6-Jul-05 20:16

toxcct

6-Jul-05 20:16

Good Morning everybody,

i'd like to get your help on that too deep problem for my mind for the moment i am reflecting on.

I have a Dialog based MFC project that i am programming on VS7.1.
It's been compiling well, and i can execute it well as far as i enter in a certain state that causes the crash (so, if there is any syntactic/writing mistake on the code exposed, it is only on this post i make an error - as i don't Copy/Paste all the code given here).

i have two main classes, plus some extra types defined outside the classes as they are used by the two classes :

<code>CFactEditorDlg</code>  (the main dialog of the program)
    - FactEditorDlg.h
    - FactEditorDlg.cpp
 
<code>COptionsDlg</code>  (the option dialog of the program, that allow the user to set some display parameters)
    - OptionsDlg.h
    - OptionsDlg.cpp
 
FactEditorTypes.h (sample) :
<font color=blue>typedef enum</font> {
    <font color=green>//...</font>
} TStartingCallCountry;
 
<font color=blue>typedef enum</font> {
    <font color=green>//...</font>
} TEditorLanguage;
 
<font color=blue>typedef unsigned char</font> TDigitsInYears;
 
<font color=blue>typedef unsigned char</font> TDigitsInPhones;
 
<font color=blue>typedef struct</font> {
    TStartingCallCountry _StartingCallCountry;
    TEditorLanguage      _EditorLanguage;
    CString              _FileViewer;
    TDigitsInYears       _NbDigitsInYears;
    TDigitsInPhones      _NbDigitsInPhones;
} TEditorOptions;

TEditorOptions is a type made to transfer the 5 fields it encapsulates from CFactEditorDlg to the COptionsDlg, and to get them back (maybe modified) then.
This is done in the OnSclickOptions button as follow :

<font color=blue>void</font> CFactEditorDlg::OnSClickOptions() {
    <font color=green>// Creates EditorOptions with 5 data members</font>
    TEditorOptions EditorOptions = {
        m_StartingCallCountry,
        m_EditorLanguage,
        m_strFileViewer,
        m_ucNbDigitsInYears,
        m_ucNbDigitsInPhones
    };
    <font color=green>//Passes the datas through an overloaded constructor</font>
    COptionsDlg OptDlg(EditorOptions, m_strEditorVersion, <font color=blue>this</font>);
    <font color=blue>int</font> iResult = OptDlg.DoModal();
    <font color=blue>if</font> (iResult == IDOK) {
        <font color=green>// Validates the changes</font>
        <font color=green>//...</font>
    }
    <font color=blue>else</font> { <font color=green>// IDCANCEL</font>
    }
}

...and here is how the constructor of COptionsDlg treats the TEditorOptions parameter :

COptionsDlg::COptionsDlg(TEditorOptions& EditorOptions,
                         CString         EditorVersion,
                         CWnd*           pParent <font color=green>/* = NULL */</font>)
        : CDialog(COptionsDlg::IDD, pParent),
            m_EditorOptions(EditorOptions)    <font color=green>// m_EditorOptions is defined as a TEditorOptions&</font>
{
    ::strcpy(m_strEditorVersion, EditorVersion);
    <font color=red>m_strEditorVersion = EditorVersion</font>;    <font color=green>// m_strEditorVersion is now a Cstring</font>
    m_strDigitsInYears.Format(<font color=gray>"%d"</font>, m_EditorOptions._NbDigitsInYears);
    m_strDigitsInPhones.Format(<font color=gray>"%d"</font>, m_EditorOptions._NbDigitsInPhones);
}

now, the problem is that the Options dialog modifies well the datas, returns them to the CFactEditorDlg::OnSClickOptions() event handler correctly (i displayed the resulting values with a MessageBox), but just when i get out the OnSClickOptions() function, i get such a weird error :

Run-Time Check Failure #2 - Stack around the variable 'EditorOptions' was corrupted.

this is exactly what i get from the Run-Time, and i really can't understand what it can mean.

if it is of any help, i tried to see what happens in the debugger, and i saw that the local EditorOptions (local to OnSClickOptions()) is staying with the values it got from the option dialog, except the fact that the CString member _FileViewer is leaving its content.
the debbugger gives this :

Before :
    _FileViewer    {0x002fa000 "notepad"}                             ATL::CStringT<char,StrTraitMFC_DLL<char,ATL::ChTraitsCRT<char> > >
 
After :
    _FileViewer    {0x002fa000 "îþîþîþîþîþîþîþîþîþîþîþîþîþîþîþîþ"}    ATL::CStringT<char,StrTraitMFC_DLL<char,ATL::ChTraitsCRT<char> > >

if anybody knows, i'm all listening at you guys...

[edit]
i modified the m_strEditorVersion in both DialogBox classes into CString.
The error remains the same...
[/edit]

TOXCCT >>> GEII power
[toxcct][VisualCalc]

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