C / C++ / MFC Discussion Boards

Re: Problems with memory when quitting application. ( and other boundschecker stuff/ranting )

Prakash Nadar6-Oct-05 15:51

6-Oct-05 15:51

Well, This is not going to be an answer to you,

Generally If i am quite sure that I have take care of memory leaks, and the leak is somewhere in Core dlls,

I ignore them.

May be Microsoft will post a new patch tht takes care of this mem leak.

-prakash

Convert String to LPSTR ?

Phernando6-Oct-05 5:29

Phernando

6-Oct-05 5:29

I'm trying to interface a DLL parameter with .Net String variable.
How do I convert the .net String type to LPSTR used on DLL parameter ?

Like this:
LPSTR sUser = this->edtUser->ToString();

but this cause the following error :
error C2440: 'initializing' : cannot convert from 'System::String __gc *' to 'LPSTR'

Mad | :mad:

Fernando Oliveira

Re: Convert String to LPSTR ?

toxcct6-Oct-05 5:41

toxcct

6-Oct-05 5:41

this is a question for the C++/CLI forum[^]...

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

Re: Convert String to LPSTR ?

PJ Arends6-Oct-05 7:30

PJ Arends

6-Oct-05 7:30

A quick glance in MSDN shows that the String class has a method called ToCharArray. Have you tried that?

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Debuggin In Visual C++ .NET

BlitzPackage6-Oct-05 5:06

BlitzPackage

6-Oct-05 5:06

Hello.

I keep getting the following messages in my output windown when I start my debugger. Do the messages below indicate that I need to install more files. By the way I am using Visual Studio Enterprise Developer:

'OIRP Test.exe': Loaded 'C:\Documents and Settings\user\My Documents\Software Development and Utilization\C Programming\OIRP Test\Debug\OIRP Test.exe', Symbols loaded.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\NTDLL.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\mfc71d.dll', Symbols loaded.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\msvcr71d.dll', Symbols loaded.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\KERNEL32.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\GDI32.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\USER32.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\SHLWAPI.DLL', No symbols loaded.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\ADVAPI32.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\rpcrt4.dll', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\msvcrt.dll', No symbols loaded.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\comctl32.dll', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\OLEAUT32.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\OLE32.DLL', Cannot find or open a required DBG file.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\MFC71ENU.DLL', No symbols loaded.
'OIRP Test.exe': Loaded 'C:\WINNT\system32\MSCTF.DLL', No symbols loaded.
The program '[1552] OIRP Test.exe: Native' has exited with code 0 (0x0).

Thanks for any help you can provide.

Thanks for your answers.

Re: Debuggin In Visual C++ .NET

C^hris L^osinger6-Oct-05 5:16

C^hris L^osinger

6-Oct-05 5:16

you can safely ignore all of those messages.

Cleek | Image Toolkits | Thumbnail maker

Re: Debuggin In Visual C++ .NET

BlitzPackage6-Oct-05 17:46

BlitzPackage

6-Oct-05 17:46

Why are these messages not important? I think sometimes I can't run the Debugger or build/compile the program because of these messages - unless I am mistaken.

Any insight that you (or someone else) can provide would be great.

Re: Debuggin In Visual C++ .NET

C^hris L^osinger7-Oct-05 1:02

C^hris L^osinger

7-Oct-05 1:02

they are unimportant because everyone gets them every time they start a debugging session. VC is just telling you about the DLLs your program is using. you're not expected to have debugging info for KERNEL32.DLL or any of the other system DLLs.

why do you think you can't debug because of this?

Cleek | Image Toolkits | Thumbnail maker

Re: Debuggin In Visual C++ .NET

Gary R. Wheeler9-Oct-05 4:36

Gary R. Wheeler

9-Oct-05 4:36

Those are all system DLL's. In order to have debug information for them, you will need to install and debug under a 'checked/debug' version of the operating system. Checked versions are available if you have an MSDN subscription.

Software Zen: delete this;

Delayed rendering OLE

Henrik Pettersson6-Oct-05 4:56

Henrik Pettersson

6-Oct-05 4:56

I've overrided COleDataSource::OnRenderGlobalData(...) in order to be able to download files that should be returned in this function in the form of CF_HDROP.

The first problem is that I need to wait in this function while the files download so I can provide them in the HGLOBAL. I download using winsock asynchronous sockets so the 'download'-functions return immediately... How do I wait until the download is complete and still be in the function? ( it's in the same thread so I can't just wait? )

Any ideas or comments? I'm quite puzzled over what to do... :\

window level, window width...in a jpg?

raw_enha6-Oct-05 3:21

raw_enha

6-Oct-05 3:21

i can convert dcm (DICOM) files into jpeg files, but i have no idea how to take into account the windowing/leveling of those dicom files. i don't want to straight up have all the values go through the conversion, i want to display only from a certain range. i know some windowing/leveling algorithms, but applying them to my DICOM files doesn't actually change the data of the dicom file (unless you save them as a DICOM tag) but regardless the image data after the header is constant.

anyone have any ideas?

-raw

Re: window level, window width...in a jpg?

Prakash Nadar6-Oct-05 15:53

Prakash Nadar

6-Oct-05 15:53

Wrong forum probably, This is VC++ forum, you might want to look for any forum related to DICOM.

-prakash

cast operator overloading

Chintoo7236-Oct-05 2:51

Chintoo723

6-Oct-05 2:51

I have a class like this:

class C {
private:
char *str;
public:
const char *getStr() { return str;}
};

This protects "str" from getting modified from outside. But thats only a myth, it can actually be modified through casting. For eg, I have been using the following for a while (it is actually very convenient for me, and safe in my application):

PathRemoveFileSpec(const_cast<char *="">(obj.getStr()))

But, I am wondering if there is any way to prevent somebody from doing this. we can perhaps overload the cast operator and make it private, but operator is on the object, not on the "char *" that is returned by getStr().

Any ideas anyone?

Re: cast operator overloading

Chintoo7236-Oct-05 3:07

Chintoo723

6-Oct-05 3:07

Ok, codeproject has eaten some of my text thinking it is apple. I should have marked it as code. Here it is again:

<br />
PathRemoveFileSpec(const_cast<char*>(obj.getStr()))<br />

Re: cast operator overloading

Chintoo7236-Oct-05 3:09

Chintoo723

6-Oct-05 3:09

Ah, I am not so good at using codeproject. Perhaps you are good at figuring out what I really wanted to write. Let me try this:

const_cast< char * >

Re: cast operator overloading

toxcct6-Oct-05 3:47

toxcct

6-Oct-05 3:47

Flace wrote:
Perhaps you are good at figuring out what I really wanted to write

nop, just wondering why you didn't just edited your post (with the little [Modify] link at the bottom right of a post) instead of posting new ones...

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

Re: cast operator overloading

Prakash Nadar6-Oct-05 16:03

Prakash Nadar

6-Oct-05 16:03

toxcct wrote:
with the little [Modify] link at the bottom right of a post

Laugh | :laugh:

-prakash

Re: cast operator overloading

icabod6-Oct-05 4:09

icabod

6-Oct-05 4:09

As far as I'm aware, you can't overload any of the _cast methods.
Use of const_cast can be tricky to do safely (which is why it's generally preferable to avoid it if you can), but I don't think there's a way to stop someone using it to remove the const'dness (!?) from an object.
It's worth checking out the C++ FAQ Lite[^] for some useful do's and dont's, and it may give you some ideas about how you could protect your class.

Re: cast operator overloading

Bob Stanneveld6-Oct-05 10:36

Bob Stanneveld

6-Oct-05 10:36

Hello,

I don't have VStudio installed here so I don't know if this works:

#ifdef const_cast
#undef const_cast
#endif // const_cast

#define const_cast                          \
char* const_cast(const char* psArg)         \
{                                           \
    /* cause a compile time assert here */  \
}

Note here that you influence the global namespace here and other developers might dislike this "feature". Also remember that using cons_cast to manipulate objects that shouldn't be manipulated is asking for trouble. So it's the responsibility of the developer who is using your class, that he is using it wisely. So don't bother too much to make your class "fool proof" somehow someone will find a way to prove you wrong!

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

-- modified at 16:40 Thursday 6th October, 2005

Network address translation help needed !

Radu Sorin6-Oct-05 2:49

Radu Sorin

6-Oct-05 2:49

I want to check an IP against the NAT table mappings . Any ideea how to do this programmaticaly using MF Confused | :confused:

C? A starting point ( or example) will be apreciated !

disable quickedit in command window

Ken Goguen6-Oct-05 1:36

Ken Goguen

6-Oct-05 1:36

When running a console application from a command window which has the quickedit option enabled, a user could inadvertently click in the window text area of the command window, placing it in edit mode. This can suspend a running console application.

Is there a way for the console application to disable/enable quiickedit for the window it's running in? If not, is there another workaround?

-kg

Ken Goguen

Re: disable quickedit in command window

andre123451-May-09 3:38

andre12345

1-May-09 3:38

Have you found an answer?

Unicode font identification

Nishad S6-Oct-05 1:34

Nishad S

6-Oct-05 1:34

How can I identify a font is unicode or not, programatically?

I have the facename only.

Thanks in advance!

- NS -

How to set Icon for EXE ?

Amarelia6-Oct-05 0:45

Amarelia

6-Oct-05 0:45

Hi
I have done with my application that I was building using MFC.

Now i want to change the ICON of the EXE which is right now Standard MFC Icon. I have *.ico file and I want to load that Icon to my EXE. Is there a way to do this...?

Regards,

Amarelia Maehsh
Gujarat
India

Re: How to set Icon for EXE ?

Rage6-Oct-05 1:05

Rage

6-Oct-05 1:05

Go into the resource editor, and modify the IDR_MAINFRAME icon (Be sure to change all sizes (16*16, 32*32, ...)

~RaGE();

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