C / C++ / MFC Discussion Boards

Re: How to create xml document using Schema in MFC application?

Cedric Moonen22-Jun-09 20:37

22-Jun-09 20:37

hemamerp wrote:
Is there an Generic utility or Generic API in MFC so that it accepts any schema file and it can create an xml file from specified schema.

This doesn't make sense: you need to have some data to fill your xml file. The xsd only specifies the structure of your final xml file, but you still have to provide the data yourself. So, from where is this data coming from ?

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

3DES encryption.

Sudhan Gandhi21-Jun-09 21:14

Sudhan Gandhi

21-Jun-09 21:14

Hi,

I wanted to use 3DES encryption in my C++/VC++ code for encypting an XML string. Could anyone please point me to some open source library which I could use directly instead of developing it all over again.

Thanks in advace.

Re: 3DES encryption.

CPallini21-Jun-09 21:24

CPallini

21-Jun-09 21:24

You don't need a open source library, Windows has Cryptography API [^] providing triple DES algorithm.
Smile | :)

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

[My articles]

Re: 3DES encryption.

Sudhan Gandhi22-Jun-09 1:17

Sudhan Gandhi

22-Jun-09 1:17

How to specify 3DES while using EncryptMessage() API. Could you please share the code snippet if you have one.

Re: 3DES encryption.

CPallini22-Jun-09 1:49

CPallini

22-Jun-09 1:49

See, for instance [^], the encryption algorithm is specified in the CryptGenKey call.
Smile | :)

Re: 3DES encryption.

Stuart Dootson21-Jun-09 23:47

Stuart Dootson

21-Jun-09 23:47

I'd recommend Crypto++[^]. I find (once you're used to the way it works) that it's easier to use than Windows Cryptographic APIs.

Jeffrey Walton's written quite a few very useful articles[^] on cryptography, using Crypto++ and (IIRC) the Windows Cryptographic API

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

[SOLVED] possible to pass in a string as UNICODE?

UserNameless21-Jun-09 20:53

UserNameless

21-Jun-09 20:53

hey,
i'm working with a function which creates a base 64 hash of a string which i enter, and then another function which verifies if the hashed data is the same as the original string. (yup its CAPICOM again Mad | :mad:

). the problem is that the sign and verify functions return _bstr_t data types and accepts UNICODE style data only. so im signing data using the sign function (which wants and returns _bstr_t type string) and then i verify it (again returns a bstr_t type) but it fails at verifying. i googled it a lot and someplaces say its because CAPICOM only works with UNICODE data. so my question: how do i pass in the bstr_t string as a UNICODE?

edit: I guess I misinterpreted the displayed value of 0...

Re: possible to pass in a string as UNICODE?

CPallini21-Jun-09 21:17

CPallini

21-Jun-09 21:17

Well, bstr_t encapsulates BSTR strings, that, roughly speaking are OLECHAR *, finally OLECHAR are WCHAR, i.e. wide char. The point is: bstr_t represent a UNICODE string so, what is your problem? Could you please post the relevant code?
Smile | :)

Re: possible to pass in a string as UNICODE?

UserNameless21-Jun-09 21:32

UserNameless

21-Jun-09 21:32

lol u asked for it Cry | :((

i don't know how familiar you are with the CAPICOM functions but this is bascially the code and below is what i want the outcome to be:

<pre>
CAPICOM::ISignerPtr signer(__uuidof(Signer));
CAPICOM::ISignedDataPtr sigData(__uuidof(SignedData));
sigData->Content = "Data to Sign";
_bstr_t sigStr = sigData->Sign(signer,true,CAPICOM_ENCODE_BASE64);
cout<<"\n\nVerified String: "<<sigData->Verify(sigStr, true, CAPICOM_VERIFY_SIGNATURE_ONLY)<<endl;
</pre>
This code sets the content to be signed to "Data to Sign", and creates a hash with the signer's private key(can be displayed by cout<<sigStr;). in Verify function it should (it does in java) display the decrypted string (i.e "Data to Sign" on the console, whereas I'm getting a 0 on my end Dead | X|

). I read the article http://www.codeproject.com/KB/security/CapicomUTF8.aspx and it mentioned that fact that it wants unicode. uh... hope that helps you figure out what i'm trying to say... Sigh | :sigh:

Re: possible to pass in a string as UNICODE?

CPallini21-Jun-09 21:46

CPallini

21-Jun-09 21:46

sadman89 wrote:
sigData->Content = "Data to Sign";

Why don't you use

sigData->Content = bstr_t(L"Data to Sign");

Re: possible to pass in a string as UNICODE? [modified]

UserNameless21-Jun-09 21:55

UserNameless

21-Jun-09 21:55

ok i tried that (and _bstr_t(..)) still the verification is displaying a 0 Confused | :confused:

i guess the cast(?) is fundamentally correct, but its still not giving me the expected output. I also looked at the excellent http://www.codeproject.com/KB/string/cppstringguide2.aspx for some new ideas but no luck Frown | :(

darn this COM and the lack of help from Microsoft

modified on Monday, June 22, 2009 4:01 AM

How to change the forms and dialogs look and feel

suthakar5621-Jun-09 19:55

suthakar56

21-Jun-09 19:55

Can anyone explain how to change the forms and other controls are look and feel (Runtime) in vc++?

Re: How to change the forms and dialogs look and feel

TyrionTheImp21-Jun-09 20:07

TyrionTheImp

21-Jun-09 20:07

Hi suthakar,

You can call the ModifyStyle or ModifyStyleEx to update ur window styles dynamically.
Alternative is to use the SetWindowLong family of functions (as documented in MSDN)
to change the style byte values, and update the window accordingly.
Just be sure that your style values are compatible with the way ur using ur dialogs/forms.

Re: How to change the forms and dialogs look and feel

suthakar5621-Jun-09 22:27

suthakar56

21-Jun-09 22:27

Hi Tyrion,
Thanks for your information.Extented that shall i add themes like office2007 styles or VISTA styles to dialogs and forms?Is there any provision for adding those themes?

Re: How to change the forms and dialogs look and feel

Hamid_RT22-Jun-09 3:26

Hamid_RT

22-Jun-09 3:26

You need to customize your control (WM_OWNERDRAW) you can find examples for each control on the codeproject.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: How to change the forms and dialogs look and feel

TyrionTheImp22-Jun-09 23:38

TyrionTheImp

22-Jun-09 23:38

yup i agree with hamid, WM_OWNERDRAW gives u full control over the drawing operations.
and sorry but i`m not too familiar with the newer Vista and Office 2007 styles

How can use Scheduler ?

Le@rner21-Jun-09 19:27

Le@rner

21-Jun-09 19:27

Hi all,

i want to use scheduler in my application.

i want to show a message on scheduled time,the scheduler should have feature of repeatition like hourly,everyday,weekly,monthly etc.

please expalin me how can i use it?

if possible please explain me with example .

thanks in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can use Scheduler ?

«_Superman_»21-Jun-09 19:38

«_Superman_»

21-Jun-09 19:38

The Scheduler in Windows is implemented as a COM object with several interfaces. Some of them are -

ITaskScheduler<br />
IScheduledWorkItem<br />
ITaskTrigger<br />
ITask

The main interface is ITaskScheduler[^].
Here is an example - http://msdn.microsoft.com/en-us/library/aa446856(VS.85).aspx[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Re: How can use Scheduler ?

Rajesh R Subramanian22-Jun-09 1:45

Rajesh R Subramanian

22-Jun-09 1:45

There are several ways of doing it. One would be to use a waitable timer object.

CreateWaitableTimer()[^] and SetWaitableTimer()[^] comes to mind immediately.

It is a crappy thing, but it's life -^ Carlo Pallini

C++ Vulnerablity

SNI21-Jun-09 18:38

SNI

21-Jun-09 18:38

Hi, I would like to know where can I find sample C++ application that can be vulnerable to attacks like buffer overflow, format string, intefer overflow ..etc...so that they will pron to Denial of service. I know what mistakes leads to these vulnerabilities but I would like to know how it will be applicable in terms of client / server technology (e.g. Web vulnerabilities). How an attacker can cause above mentioned attacks in C++ application. I would like to know the scenarios in C++ application. If anyone know this will be helpful.

Thanks

SNI

Re: C++ Vulnerablity

«_Superman_»21-Jun-09 18:59

«_Superman_»

21-Jun-09 18:59

Read about it here - http://searchsoftwarequality.techtarget.com/sDefinition/0,,sid92_gci213591,00.html#[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Re: C++ Vulnerablity

SNI21-Jun-09 19:10

SNI

21-Jun-09 19:10

Thanks for ur reply. This will give me what kind of attacks that C++ application can be vulenerable to but i want the scenario (C++ application) where these vulnerabilities can happen so I can simulate them in a programmed manner.

Thanks

SNI

CreateNewChild and mouse messages

prithaa21-Jun-09 15:13

prithaa

21-Jun-09 15:13

Hello,

I have created a child window using CreateNewChld function

CMDIChildWnd* ChildPt = pFrame->CreateNewChild(RUNTIME_CLASS(TableFrame),TITLE_Production, m_hMDIMenu, NULL);

TableFrame* pF = STATIC_DOWNCAST(TableFrame,ChildPt);

pF->FrameInit(PRODUCTION,FontVector2,true);

The window is created using the class TableFrame but the mouse clck messages are not diverted to the the TableFrame class . Why is that so?

When I click the minimize,maximize buttons of the window the OnSize() of TableFrame is called

Pritha

Error when creating classes for dialog boxes or new class

l_d21-Jun-09 7:06

l_d

21-Jun-09 7:06

When i tried to create a Dialog class (vc++ 6), it gives an error called" Unable to open the files TestDialog.h and TestDialog.cpp" ( project name:Test)
i am getting the same error even creating a new class using class wizard.

i donot know how to clear this error.

Re: Error when creating classes for dialog boxes or new class

«_Superman_»21-Jun-09 16:20

«_Superman_»

21-Jun-09 16:20

It could be possible that some of the files needed by the class wizard like .clw could be read-only.
Ensure all files have write access and try again.

«_Superman_»
I love work. It gives me something to do between weekends.

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