Re: Problems with cvSobel and cvLaplace functions under visual studio 2010 - ATL / WTL / STL Discussion Boards

Re: Accessing web service in native C++ application

Yusuf20-Feb-11 1:52

20-Feb-11 1:52

Are you following that example literally? The MSDN how to is very old and the webservice it is pointing to http://apps.gotdotnet.com/QuickStart/HelloWorld/HelloWorld.asmx?WSDL[^] no longer exists. You need to follow the spirit of the example with different or webservice.

try this

http://www.w3schools.com/webservices/tempconvert.asmx[^]

http://www.w3schools.com/webservices/tempconvert.asmx?WSDL[^]

Yusuf
May I help you?

OPC connectivity timeout problem

Neo Andreson14-Feb-11 20:19

Neo Andreson

14-Feb-11 20:19

I am using Softing OPC client which connects to OPC driver but if the loading takes more than 2 mins it's automatically shutdown the driver please suggest me something.
Tested with other clients also but the same problem persist.

Thanks in advance!!!!

Truth Is The Simplest !!!!

Re: OPC connectivity timeout problem

Richard MacCutchan14-Feb-11 23:00

Richard MacCutchan

14-Feb-11 23:00

Does this have something to do with ATL, WTL or STL?

I must get a clever new signature for 2011.

Re: OPC connectivity timeout problem

Neo Andreson15-Feb-11 1:55

Neo Andreson

15-Feb-11 1:55

Yes ,
It's COM server and problem is with CoCreateInstance() if it takes more than 120 sec it automatically shutdown the COM based server.

Truth Is The Simplest !!!!

Re: OPC connectivity timeout problem

Richard MacCutchan15-Feb-11 2:11

Richard MacCutchan

15-Feb-11 2:11

That sounds like an issue for the server. I would suggest you try the OPC website for more information, unless you have the source code and can show where the problem is.

I must get a clever new signature for 2011.

Bring bits of old MFC apps into an ATL app

Craig Longman11-Feb-11 6:59

Craig Longman

11-Feb-11 6:59

I have a app using ATL for both the COM and the Service pieces. I have recently had need to bring in some old code that archives itself via CArchive (MFC). I don't seem to be able to hack up the right choices/orders of headers for getting the ATL classes like CAtlServiceModuleT while still have the MFC class CArchive available.
The only docs I've found so far, deal with including the MFC bits first, then the ATL bits. But that defines _AFX, and so the ATL bits leave out items like CAtlServiceModuleT.

Is there some way to make ATL the "main" library and then pull in the MFC bits later? Short of #undef'ing too many things and/or pulling bits out of header files, etc.

Thanks,
CraigL

Problems with cvSobel and cvLaplace functions under visual studio 2010

A&Ms11-Feb-11 0:38

A&Ms

11-Feb-11 0:38

Hi,
I have downloaded OpenCV 2.2.0 distribution for visual studio 2010 and as i started programming with the opencv APIs under VS 2010 I faced a terrible problem.
cvSobel and cvLaplace functions always throw cv::Exceptions and also their exceptions could have not been handled with try ... catch blocks.
the provided error is: Unhandled exception at 0x7463b727 in App.exe: Microsoft C++ exception: cv::Exception at memory location 0x003bfb9c.
and here is my code:

IplImage* pImage = cvLoadImage("..\\Tulips.jpg");

	IplImage* pImage1 = cvCreateImage(
		cvSize(pImage->width, pImage->height),
		pImage->depth,
		pImage->nChannels
		);

	IplImage* pImage2 = cvCreateImage(
		cvSize(pImage->width, pImage->height),
		pImage->depth,
		pImage->nChannels
		);
		
	cvSobel(pImage, pImage1, 0, 1, 2);
	cvLaplace( pImage, pImage2);
	

	cvNamedWindow("Image", CV_WINDOW_AUTOSIZE);
	cvShowImage("Image", pImage);

	cvNamedWindow("Image1", CV_WINDOW_AUTOSIZE);
	cvShowImage("Image1", pImage1);

	cvNamedWindow("Image2", CV_WINDOW_AUTOSIZE);
	cvShowImage("Image2", pImage2);
	
	cvWaitKey(0);

please, help me if I am forgetting sth.

Re: Problems with cvSobel and cvLaplace functions under visual studio 2010

RockwoodGuitar6-Apr-11 0:16

RockwoodGuitar

6-Apr-11 0:16

You cannot use any type of images with a sobel operator. If you use a 8U image as the source then the destination image needs to be 16S (not even 16U) because of some overflow issue then you can transform if back to 8U at will.

Displaying html text on windows form

nachiket0710-Feb-11 13:57

nachiket07

10-Feb-11 13:57

Hi,
How can I display html text on a windows form using ATL/WTL in C++? I want to mimic Microsoft Office tooltips in my C++ windows app.

Thanks!

Re: Displaying html text on windows form

Cool_Dev13-Feb-11 20:37

Cool_Dev

13-Feb-11 20:37

web browser activex control is the first option for html.

Re: Displaying html text on windows form

nachiket0714-Feb-11 19:29

nachiket07

14-Feb-11 19:29

Thanks for replying, but I am working with a Windows Form using ATL/WTL.

Re: Displaying html text on windows form

Cool_Dev14-Feb-11 23:35

Cool_Dev

14-Feb-11 23:35

it is an activex control, you can definitely use it with all micosoft programing technologies.

C++ - how to refer any header file from a dll while loading throu loadLibrary ?

DavJes7-Feb-11 1:44

DavJes

7-Feb-11 1:44

Hi I m trying to load the dll using LoadLibrary which works fine.

But for one of the method paramter is an object of class which is refered inside the dll . So in this case in my client app how do i refer the .h file which is already refered in the dll inside ?

As i m trying to link dynamically how does header file references are dealt with ?

Thanks

Re: C++ - how to refer any header file from a dll while loading throu loadLibrary ?

Richard MacCutchan7-Feb-11 5:27

Richard MacCutchan

7-Feb-11 5:27

DavJes wrote:
So in this case in my client app how do i refer the .h file

The same way as any header file is referenced; either add it to your project or add the location to the list of include directories.

If you are saying that you do not have access to the header file, then you have a problem.

I must get a clever new signature for 2011.

encryption using VS C/C++

Alan Kurlansky27-Jan-11 5:25

Alan Kurlansky

27-Jan-11 5:25

What would be an easy way to encrypt/decrypt userID/password data coming in from potential remote user to a secure server? Phase 2 might include encrypting the subsequent data flow as well.
Any ideas would be appreciated.
Thanks

Re: encryption using VS C/C++

jk chan27-Jan-11 6:10

jk chan

27-Jan-11 6:10

in Windows you can use Crypto APIs. see http://msdn.microsoft.com/en-us/library/aa382016(v=vs.85).aspx[^]

If u can Dream... U can do it

Re: encryption using VS C/C++

Alan Kurlansky28-Jan-11 1:19

Alan Kurlansky

28-Jan-11 1:19

Thanks. I'll check that out.

Re: encryption using VS C/C++

Gene OK14-Feb-11 6:22

Gene OK

14-Feb-11 6:22

I wrote a small WTL application to illustrate the crypto functions. I also transform the encrypted string to a Base64 for transmittal across the internet. Might be of help to you, although a little late.

http://www.codewiz51.com/blog/post/2010/11/16/WTL-application-to-encrypt-a-character-string.aspx[^]

~Gene

-- Life is not a spectator sport. I came to play.
My Web Site, Blog & Wiki

how to close document handle

VCsamir26-Jan-11 18:17

VCsamir

26-Jan-11 18:17

hi friends,

i have have a MDI Application. when i close a document using onclosedocument. my document handle remains active though the members used in document are set to null. so i cannot check this condition
if(doc)
as it returns true. whereas in the if block it cannot access the members so app crashes
eg.
<pre>
if(doc) //handle =FAEX000
{
doc->getprivatevariable_or_functions(); // the application crashes here
}
</pre>

thanking in anticipation

REgards
Samir

Re: how to close document handle

Richard MacCutchan26-Jan-11 22:36

Richard MacCutchan

26-Jan-11 22:36

When you close your document set the variable to NULL to indicate that it no longer exists.

I must get a clever new signature for 2011.

Connections points and clients and really hot chicks

Jim Crafton19-Jan-11 7:42

Jim Crafton

19-Jan-11 7:42

OK, the really hot chicks part was just a joke.

Seriously, I have an ATL COM server that runs as a service. The ATL server is run as a singleton (REGCLS_MULTIPLEUSE). I've got a series of "client" apps (on the same machine) that send the server some data. When the server is shutdown, I want to send an event to the clients. Since I'm using COM I figured I'd use connection points. The server does this with ATL's IConnectionPointContainerImpl, and their proxy class wrapper around the dispatch event interface. I can see that the client properly registers with the server. But when the server tries to call back the client interface, it get's an error, and the client gets an access violation.
Is there some obvious step I've missed? On the client side I'm using ATL's IDispEventImpl to implement the dispatch interface callback.

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Re: Connections points and clients and really hot chicks

cariolihome19-Jan-11 12:32

cariolihome

19-Jan-11 12:32

Add Your code and error description, please

Cocoa or Qt4?

Daniel Stefanovski19-Jan-11 5:14

Daniel Stefanovski

19-Jan-11 5:14

Hi,

I'm slowly getting into GUI Development and made first experiences with C++/Qt4 which I really like.
I focus on OSX Development so I decided to give a try to Xcode and Cocoa too. I tried the first tutorial where u build a simple currency converter. And I'm finding this very confusing. Am I really forced into using this Interface Builder App?

I think that GUI Development with Qt is much better to learn and faster to code and I have a much better overview over my Interface and all those signals, slots, senders and so on if I don't have to use those object inspectors just to check what object is connected to what...

What do you think? Should I give XCode another try or do you share my first impression?

Re: Cocoa or Qt4?

Steve Maier19-Jan-11 5:38

Steve Maier

19-Jan-11 5:38

I was using XCode to do iPhone development and found it to be a challenge as well. What I did is to change to use MonoTouch (.NET) for iPhone development. There actually is a version of Mono that works pretty well on the Mac if you are a .NET programmer. Knowing Obj-C is not a bad thing, but it is not that fast when you are used to other things.

Other people have done their Mac apps with Air or Java. I know Qt is definately faster for most people starting out than Obj-C is. So if you do not want to use Air, Java, or Mono, then I would say Qt will be faster, but having the knowledge of Obj-C is good as well since alot of the sample code out there for a Mac is written in Obj-C.

Steve Maier

How to identify the change in SQL database using MFC

ganesh_IT18-Jan-11 19:53

ganesh_IT

18-Jan-11 19:53

Hi guys, am in a MFC project for that i need to notify my client when any data is updated or inserted in my server database.

I am using CSocket for server client connections, how can i identify the change and how to notify my client that's my problem.I am beginner in MFC .

If you know pls guide me .

Thanks in advance

ganesh_IT

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