Re: MFC Socket - C / C++ / MFC Discussion Boards

Re: How to stretch a bitmap to fit the size of picture control?

GCFMAT23-Feb-10 17:52

GCFMAT

23-Feb-10 17:52

CStatic* pContol = (CStatic *) GetDlgItem(IDC_ST_PICTUREBOX);
pControl->ShowWindow(SW_MAXIMIZE);

create a process from a process and have it not in the same security context

aolinc383-Jun-09 15:33

aolinc38

3-Jun-09 15:33

is this possible?

I launch a process from my main process and when the second process attempts to use DLLs that the first is using, the second program crashes. However, when I click the icon for the second application while the first application is running, it accesses these DLLs just fine. I have used CreateProcess and ShellExecute to launch and both provide the same outcome. If CreateProcessAsUser is the solution, will it work for creating the process as the same user who launched the first process?

Re: create a process from a process and have it not in the same security context

norish3-Jun-09 15:57

norish

3-Jun-09 15:57

The answer is yes for your question. Smile | :)

But I geuss it is not the solution for your situation.
Is the platform vista? If is that so, some issues are around UAC...
Is it the fact the reason of crash that is origined from some of security context errors?

Re: create a process from a process and have it not in the same security context

cefarix3-Jun-09 17:53

cefarix

3-Jun-09 17:53

You should be able to give the new process a different security context by using lpProcessAttributes->lpSecurityDescriptor.

How the output?

Gjm3-Jun-09 12:41

Gjm

3-Jun-09 12:41

Consider the following code in C:

#include<stdio.h>
#include<conio.h>
void main()
{
int n;
clrscr();
scanf("%s",n);
printf("%s");
getch();
}

Question: The above program amazingly reads a string and prints it but I don't know how/ Plz help me.
Plz specify the working of scanf and printf in the above program. n is not given as an address to the scanf function and printf contain only format strings.

Awaiting a good reply Sniff | :^)

Re: How the output?

Stuart Dootson3-Jun-09 12:48

Stuart Dootson

3-Jun-09 12:48

In the scanf call, scanf will take n to be a char* value, so will store the string read in at the address given by n. You're just 'lucky' that n's value is equivalent to a writeable address.

The printf call? Well, as printf is a variadic funtion, it'll look up the stack from the pushed format string, looking for argument values. The next value on the stack above the format string is (you guessed it!) n, so printf will see n, interpret it as a char* value and print the string at that address.

The joys of a type-unsafe system programming language Smile | :)

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

MFC Socket

reddy073-Jun-09 10:16

reddy07

3-Jun-09 10:16

Hi,
I am working on MFC Asynchronoussocket program, I could able to successfully send and receive messages between one to one client and server using accept, receive classes. But when i am trying to connect multiple client to server, my application crashes. And I also wonder, if I able to accept multiple client, how would I match the send and receive messages between different clients and server.
Could anyone please help me out!!!

Thanks
Reddy

Re: MFC Socket

David Crow3-Jun-09 11:01

David Crow

3-Jun-09 11:01

reddy07 wrote:
And I also wonder, if I able to accept multiple client, how would I match the send and receive messages between different clients and server.

I've only looked at the basics of this quite some time ago, but the structure that accept() populates on the server has a sin_addr member. Can you pass that to inet_ntoa()?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"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

Re: MFC Socket

reddy073-Jun-09 12:06

reddy07

3-Jun-09 12:06

Thanks david, I solved it - now I could able to establish mulitple client with single server, but I am facing problem in receving messages from clients. Server couldnt receive the message that client is sending. On client side, client is sucessfully sending the message. Could you please throw some light.
Binding i will look into it later once server start receving messages

Huge memory leak C++ C Program. [modified]

jobin0070073-Jun-09 9:50

jobin007007

3-Jun-09 9:50

Hi.

I have a program which is creating a huge memory leak. Here is an example of my program. This is not an actual code but an example which references my program.

Class ABC
{

static int *B;
}

Class DEF{
int *MALLOC_C[20];
void Function1(int* ptr);
void Function2( );

}
ABC[10];
DEF[10];

void main()
{
int *sample=new sample();
*sample=1;
ABC* Object1[20];
DEF* Object2[20];
for(int i=0;i<20;i++) //Edited
{
Object1[i]=new ABC();
Object2[i]=new DEF();
}

for(int i=0;i<20;i++)
{
Object[i].Function1(sample);
}

for(int i=0;i<20;i++)
{
delete Object1[i];
delete Object2[i];
}

}

DEF::Function1(int *ptr)
{
ABC::B=ptr;
}
DEF::Function2()
{
for(int i=0;i<20;i++)
{MALLOC_C[i]=(int*) malloc(1000*sizeof(int) ); //Edited,Corrected
}
//DO processing on MALLOC_C

for(int i=0;i<20;i++)
free(MALLOC_c[i]);

}

This is what I am doing. What is wrong? Please help!

modified on Wednesday, June 3, 2009 10:08 PM

Re: Huge memory leak C++ C Program.

Luc Pattyn3-Jun-09 10:53

Luc Pattyn

3-Jun-09 10:53

jobin007007 wrote:
MALLOC_C=(int*) malloc(1000*sizeof(int) );

why is this line inside a for(i) loop and not using i?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Re: Huge memory leak C++ C Program.

jobin0070073-Jun-09 12:07

jobin007007

3-Jun-09 12:07

My mistake. Its been edited.

It should have been-

MALLOC_C[i]=(int*) malloc(1000*sizeof(int) );

Thanks

Re: Huge memory leak C++ C Program.

norish3-Jun-09 15:32

norish

3-Jun-09 15:32

Leaks maybe in this Poke tongue | ;-P

int *sample=new sample();

And below makes infinite loop Poke tongue | ;-P

for(int i=0;i<20)
{
  Object1[i]=new ABC();
  Object2[i]=new DEF();
}

If you use VC, microsoft provides some helpfull debug runtime like _CrtCheckMemory.
If you do not, make memory management library or use some like those.

Happy debug!

Solved: Huge memory leak C++ C Program.

jobin0070073-Jun-09 16:11

jobin007007

3-Jun-09 16:11

It was a stupid variable issue.
I was not going through the whole array

Basically I was doing the below->

for(int i=0;i<20;i++)
{
MALLOC_C[i]=(int*) malloc(1000*sizeof(int) ); //Edited,Corrected
}

for(int i=0;i<10;i++) //Notice the 10. It should have been 20
free(MALLOC_c[i]);

the Prompt save message

susanne13-Jun-09 4:56

susanne1

3-Jun-09 4:56

Hallo in my SDI-Application i have the following problem: when i write something and click close or exit the application
does not ask me if i want to save the document /file or not(the prompt message does not appear???) please help.

Re: the Prompt save message

David Crow3-Jun-09 4:58

David Crow

3-Jun-09 4:58

Have you called the document's SetModifiedFlag() method?

Re: the Prompt save message

susanne14-Jun-09 0:55

susanne1

4-Jun-09 0:55

i have now the following Code :
When i click on the close or exit button, OnDeleteContents() will be called:

void CTest_Doc::OnDeleteContents()
{
CDocument::DeleteContents ();
CDocument::OnCloseDocument();
CDocument::SetModifiedFlag(1);
}

after that there is a heap problem???

Re: the Prompt save message

susanne14-Jun-09 1:00

susanne1

4-Jun-09 1:00

okay i corrected :

void CTest_Doc::OnDeleteContents()
{
CDocument::SetModifiedFlag(1);
CDocument::DeleteContents ();
CDocument::OnCloseDocument();
}

but the Prompt save message stiil not appear??

Re: the Prompt save message

David Crow4-Jun-09 5:47

David Crow

4-Jun-09 5:47

susanne1 wrote:

but the Prompt save message stiil not appear??

Because you are possibly calling SetModifiedFlag() too late. It needs to be called as soon as the document changes.

Restart Manager Using VS2005 MFC

Member 41040373-Jun-09 4:44

Member 4104037

3-Jun-09 4:44

I am facing issue while implementing restart manager in VS 2005 MFC project. it is saying restartmanager.h is not found. I am implementing this for W2k8 and Vista OS. I am not getting information about Which VS support this. I found VS 2005 C# is supporting this.

Would it be possible to implement restart manager in VS 2005 MFC project?

Re: Restart Manager Using VS2005 MFC

Stuart Dootson3-Jun-09 9:08

Stuart Dootson

3-Jun-09 9:08

You need to a) install a version of the Windows SDK that supports Restart Manager[^], b) tell VS2005 to use it (the SDK release notes[^] tell you how), and c) tell the SDK that you want to use Vista features[^].

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

DEBUG to RELEASE

eli150219793-Jun-09 4:35

eli15021979

3-Jun-09 4:35

Hi,

I'm facing some problem when trying to build my solution in Release mode(building in debug mode works fine).
My solution contains several project(10 of them are static libraries and one is the executable which uses those libraries).
One of the static libraries is the GUI implementation(MFC).
I've configured the properties of each project in release mode(e.g. use MFC as a shared DLL , use runtime library as Multi-Threaded DLL[\Md] etc.).
I've managed to compile the entire solution,but failed to link the executable.
I'm getting the following error

<br />
Linking...<br />
GsaActLib.lib(g_act_hndlact.obj) : warning LNK4075: ignoring '/EDITANDCONTINUE' due to '/INCREMENTAL:NO' specification<br />
mfcs80.lib(nolib.obj) : warning LNK4098: defaultlib 'nafxcw.lib' conflicts with use of other libs; use /NODEFAULTLIB:library<br />
HmiLib.lib(h_windsp_formMng.obj) : error LNK2019: unresolved external symbol __imp___invalid_parameter_noinfo referenced in function "public: bool __thiscall std::_Tree<class std::_Tmap_traits<class IlvGadgetContainer *,int,struct std::less<class IlvGadgetContainer *>,class std::allocator<struct std::pair<class IlvGadgetContainer * const,int> >,0> >::const_iterator::operator==(class std::_Tree<class std::_Tmap_traits<class IlvGadgetContainer *,int,struct std::less<class IlvGadgetContainer *>,class std::allocator<struct std::pair<class IlvGadgetContainer * const,int> >,0> >::const_iterator const &)const " (??8const_iterator@?$_Tree@V?$_Tmap_traits@PAVIlvGadgetContainer@@HU?$less@PAVIlvGadgetContainer@@@std@@V?$allocator@U?$pair@QAVIlvGadgetContainer@@H@std@@@3@$0A@@std@@@std@@QBE_NABV012@@Z)<br />
HmiLib.lib(h_utils_studio_attrGadget.obj) : error LNK2001: unresolved external symbol __imp___invalid_parameter_noinfo<br />
HmiLib.lib(h_utils_studio_enumGadget.obj) : error LNK2001: unresolved external symbol __imp___invalid_parameter_noinfo<br />
HmiLib.lib(h_utils_studio_egGadget.obj) : error LNK2001: unresolved external symbol __imp___invalid_parameter_noinfo<br />
.\Release/link.exe : fatal error LNK1120: 1 unresolved externals<br />
<br />
Error executing link.exe (tool returned code: 1120)<br />
<br />
Newlink - 5 error(s), 68 warning(s)<br />

I've trying to google a little bit but didn't find an explanation for the above error.

Anyone? D'Oh! | :doh:

With best regards,
Eli

Re: DEBUG to RELEASE

David Crow3-Jun-09 5:00

David Crow

3-Jun-09 5:00

eli15021979 wrote:
GsaActLib.lib(g_act_hndlact.obj) : warning LNK4075: ignoring '/EDITANDCONTINUE' due to '/INCREMENTAL:NO' specification
...
I've trying to google a little bit but didn't find an explanation for the above error.

Did you look here?

Re: DEBUG to RELEASE

eli150219793-Jun-09 18:25

eli15021979

3-Jun-09 18:25

Hi David.

Thanks for your help,but this warning is not my problem...
I know that my problem is the errors below(LNK2001)...I just can't find the call for invalid_parameter_noinfo.
According to MSDN(relating LNK2001):

When compiling with /MD, a reference to "func" in your source becomes a reference "__imp__func" in the object since all the run-time is now held within a DLL. If you try to link with the static libraries LIBC.lib or LIBCMT.lib, you will get LNK2001 on __imp__func. If you try to link with MSVCxx.lib when compiling without /MD you will not always get LNK2001, but you will likely have other problems.

All the libraries in the solution,as well as the executable, are being compiled with /Md option(i.e runtime library is a multhi-threaded DLL).
In the linker option I specified the linker to ignore LIBC,LIBCMT and MSVCRT default libraries.
But still,I get those error...

Anything?

Thanks again,
Best regards,
Eli

Re: DEBUG to RELEASE - SOLVED!!!!

eli150219793-Jun-09 19:29

eli15021979

3-Jun-09 19:29

Hi David,

I removed MSVCRT.lib from default libraries ignore list and it's working just fine.

Thanks again,
Eli

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