Error when creating classes for dialog boxes or new class - C / C++ / MFC Discussion Boards

Le@rner21-Jun-09 19:27

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.

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

David Crow22-Jun-09 4:10

David Crow

22-Jun-09 4:10

That is a known ClassWizard error. It can usually be ignored, however. You might try closing Visual Studio, deleting the temporary files (e.g., opt, ncb, clw, aps, pch), and then re-opening the project.

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

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

l_d23-Jun-09 8:51

l_d

23-Jun-09 8:51

Even after following the above procedure i am getting the same error ,after repeating the steps for 4-5 times then i am able to create dialog class.

can u please suggest me any other solution to the problem.

thanks ®ards

Embedded Structure

Gjm21-Jun-09 6:25

Gjm

21-Jun-09 6:25

What do u meant by embedded structures in C?

Re: Embedded Structure

CPallini21-Jun-09 6:51

CPallini

21-Jun-09 6:51

Gjm wrote:
What do u meant by embedded structures in C?

I don't know, a structure as part of another structure, I guess. And what do you mean with it?
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: Embedded Structure

Stuart Dootson21-Jun-09 13:47

Stuart Dootson

21-Jun-09 13:47

Probably something like:

struct A
{
   struct
   {
      int a;
      int b;
   } embedded_struct;
   int c;
};

embedded_struct is a data member of A with struct type.

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

GetCapture and SetCapture

prithaa21-Jun-09 2:08

prithaa

21-Jun-09 2:08

Hello,

ANy one can guide me with the difference between SetCapture and GetCapture or articles on the same.

thanks
Pritha

Re: GetCapture and SetCapture

«_Superman_»21-Jun-09 4:18

«_Superman_»

21-Jun-09 4:18

I don't understand why you are confused between the two.
I'm sure you understand what Set and Get means.
The only similarity is in the return value which is the previous or current window that has captured the mouse.

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

Re: GetCapture and SetCapture

prithaa21-Jun-09 4:29

prithaa

21-Jun-09 4:29

Hello,

Thanks for your reply

BUt I was confused b coz of my problem that I mentioned in my next q . So I wanted to read good articles on SetCapture

Re: GetCapture and SetCapture

Varun Verma31-Aug-09 11:36

Varun Verma

31-Aug-09 11:36

Hi,

I am totally new to WinAPI programming. My requirement is to extract the handler to the current window when the user clicks over it or uses Alt+Tab to navigate to the window. The definition of GetCapture should return a handler to the window that has captured the mouse.

My question is when and how can I call the GetCapture() function? My requirement is to invoke the function whenever a mouse or keyboard event occurs. Can you please guide me how my program can be alerted to a click or keyboard event.

Thanks
-Varun.

SetCapture and ReleaseCapture

prithaa21-Jun-09 1:46

prithaa

21-Jun-09 1:46

Hello,

I have a child window derived from CMDIChildWnd and the window has a few CRichEditCtrl derived windows displayed properly on them.

But I am confused how to write the mouse capture for this window.

When the mouse moves over the window or left button is pressed on the window the mouse click message is not handled but if I press left mouse button over te minimize,maximize icons of the windows the messsage is andled and OnSize()function is called.

Why the OnLButtonDown()message not handled in the class which is derived from CMDIChildWnd?

Pritha

I need Algorithm to compute Strict Avalanche Criterion for nonlinear boolean functions?

alaaomar20-Jun-09 20:27

alaaomar

20-Jun-09 20:27

I need an algorithm or C program by which I can compute the Strict Avalanche criterion of the nonlinear boolean functions

Re: I need Algorithm to compute Strict Avalanche Criterion for nonlinear boolean functions?

killabyte20-Jun-09 23:34

killabyte

20-Jun-09 23:34

try www.homeworkproject.com not codeproject.com

I need Algorithm to compute correlation Immunity for boolean functions?

alaaomar20-Jun-09 20:25

alaaomar

20-Jun-09 20:25

correlation immunity is an important criterion for boolean functions, I need an algorithm or C program to compute the correlation immunity for any boolean function.

Re: I need Algorithm to compute correlation Immunity for boolean functions?

molesworth20-Jun-09 23:21

molesworth

20-Jun-09 23:21