C / C++ / MFC

Rajesh R Subramanian17-May-09 23:32

17-May-09 23:32

Madan Chauhan wrote:
But the function fail with #error 87.

FormatMessage()[^] says: "The parameter is incorrect". So, you could check if all the parameters are valid before you pass it to the function.

You could as well use the Error lookup utility which comes with VS to get the error description for an error number.

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

Madan Chauhan17-May-09 23:46

Madan Chauhan

17-May-09 23:46

Thanks for the reply.
Yes all the parameters are correct. Is there some extra job need to do before executing this function?

C++myLife17-May-09 23:46

C++myLife

17-May-09 23:46

Hi Madan Chauhan,
Only FSCTL_EXTEND_VOLUME is not sufficient to extend any NTFS volume. You need to first extend its boundry then use this control code.

thanks
CmyLife Big Grin | :-D

Madan Chauhan17-May-09 23:56

Madan Chauhan

17-May-09 23:56

Thanks for your guidance.
I dont have any idea which API or function extend the boundary of partition.
Please tell me if you know that one.

thanks.

C++myLife17-May-09 23:56

C++myLife

17-May-09 23:56

Go through this article http://msdn.microsoft.com/en-us/library/aa365181(VS.85).aspx[^]

Big Grin | :-D

Madan Chauhan18-May-09 0:36

Madan Chauhan

18-May-09 0:36

Thanks for ur support CmyLife I done it.

About Thread Synchronization

C++myLife18-May-09 0:39

C++myLife

18-May-09 0:39

Hey madan tats gud.I did this same thing few years back, anyways enjoy.

Big Grin | :-D

hanq_3891013017-May-09 23:16

hanq_38910130

17-May-09 23:16

Hi all,

I'm having an application for Remote control, but there are some problems in its part of network connections.I have tried for weeks, still can't find out the reason for that.

In our program, we don't use thread synchronization in function "TCPSock->Recv"(winsock api recv() is used in it), because this function is only used in single thread. Today, I tried to add thread synchronization to this function.As a result, these network connections problems are fixed(at least it seems to be).

My question is, "Is thread synchronization needed when only using a function in single thread?"

Regards,
HQ

Rajesh R Subramanian17-May-09 23:21

17-May-09 23:21

hanq_38910130 wrote:
"Is thread synchronization needed when only using a function in single thread?"

It is actually the other way round. If you are using multiple threads, then you try to synchronize access to the code that must be protected from multiple simultaneous accesses.

Or is that you are referring to an additional worker thread (other than the application's main thread) while saying a "Single thread"?

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

hanq_3891013017-May-09 23:34

hanq_38910130

17-May-09 23:34

Thanks for your replay Smile | :)

Yes, I mean "an additional worker thread" when I say "a single thread".
Our program mainly has two parts, server and client.
server accepts connections from client, when a connection is accepted, it creates a "worker thread" to communicate with the client. Only in this thread, "TCPSock->Recv()" will be called, so originally we don't use a "Thread Synchronization". But today, I Added "Thread Synchronization", and the bugs seem to be fixed, so I want to know "Is Thread Synchronization needed in single thread in some conditions?"

Thanks very much Smile | :)

Rajesh R Subramanian17-May-09 23:38

17-May-09 23:38

hanq_38910130 wrote:
But today, I Added "Thread Synchronization", and the bugs seem to be fixed

Glad about that.

hanq_38910130 wrote:
"Is Thread Synchronization needed in single thread in some conditions?"

But, I still am not able to understand this. If it is just one thread accessing the code that must be 'protected', then it does not matter how many other threads are running simultaneously. But if more than one thread can possibly access the code that must be protected, then you need synchronization. I hope I am clear.

There is a whole lot of information on this topic here[^] if you would like to read up.

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

Re: Doubt on segmentation

hanq_3891013017-May-09 23:47

hanq_38910130

17-May-09 23:47

Thanks for your help.

I will look into the linking which you provided to see if there can be any useful information.
Add maybe the reason that causes all these problems exist in some other code, anyway I will check this. Poke tongue | ;-P

Doubt on segmentation

Sakthi.Gs :-)17-May-09 22:57

Sakthi.Gs :-)

17-May-09 22:57

Hi...

[ImageProcessing]My doubt is how to extract text from the image..before extraction we need to segment properly....

Rajesh R Subramanian17-May-09 23:05

Re: Doubt on segmentation

17-May-09 23:05

Stop spamming the site with your meaningless posts. Dead | X|

Read the guidelines[^] before posting anything more.

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

Naveen17-May-09 23:19

Naveen

17-May-09 23:19

Did you mean OCR ? Here is a sample OCR With MODI in Visual C++[^]

nave

[OpenedFileFinder] [My Blog]

cricheditctrl on cmdichildwnd

prithaa17-May-09 22:51

17-May-09 22:51

Hello,

class CRICH : CRichEditCtrl
{

afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
afx_msg void OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags);
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);

};

I have 5 CRICH boxes on CMDIChildWnd which are shown properly with a cursor in the first box . That is it has focus but once if I press a mouse cursor on the box the cursor disappears and none of the boxes has focus.If I click the mouse on the box LButtonDown message handler is not called.

What must be the problem ? thanks

Prithaa

Sakthi.Gs :-)17-May-09 23:00

Sakthi.Gs :-)

17-May-09 23:00

For that we Need to set Focus for the 2nd box once i u have pressed enter..n u should monitor the window properly

Sakthi.Gs :-)17-May-09 23:06

Sakthi.Gs :-)

17-May-09 23:06

Use the SetFocus Function & handle properly..

prithaa17-May-09 23:16

17-May-09 23:16

Hello,

Thanks

When 5 boxes appear on the window and I move the mouse on the box the cursor should change from arrow cursor to text type line cursor but the cursor type doesnt change.

Pritha

Chandrasekharan P18-May-09 1:59

Chandrasekharan P

18-May-09 1:59

see first you write down all what needs to be done. Don't keep on adding requirements.

prithaa18-May-09 2:08

18-May-09 2:08

Hello,

Thanks for your reply.

I am not adding to my requirements .I am just saying that the cursor type doesnt cange hence I am not able to handle the mouse LButtonDown message. If it had changed than I would have been able to handle the mouse messages.

Prithaa

Chandrasekharan P18-May-09 2:18

Chandrasekharan P

18-May-09 2:18

what is that you have done to change the cursor type?

prithaa18-May-09 3:11

18-May-09 3:11

Hello,

thansk for your reply.

I have done nothing to change the type but I thought since when the mouse goes on the box the arrow point automatically changes to text type pointer.

But somewhere I feel the box is not identified by the mouse .

prithaa

Chandrasekharan P18-May-09 18:02

Chandrasekharan P

18-May-09 18:02

i don't think what you need will automatically happen. you are not setting the cursor. you are setting the focus to the editbox. you can always hide the cursor but AFAIK changing the cursor to text type pointer is not possible

prithaa18-May-09 19:47