C / C++ / MFC

Richard MacCutchan15-May-15 2:53

Richard MacCutchan

15-May-15 2:53

Where exactly is line 54, and what are the values of the variables that are being referenced?

David Crow15-May-15 2:13

David Crow

15-May-15 2:13

Single step through the code using the debugger.

"One man's wage rise is another man's price increase." - Harold Wilson

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Philippe Mori16-May-15 2:45

Philippe Mori

16-May-15 2:45

And test one function at a time for each case. Put breakpoint in each branch and ensure you test each one or better yet, make unit test for each one.

Philippe Mori

Copy Text from dialog box

Philippe Mori16-May-15 2:41

Philippe Mori

16-May-15 2:41

C++

element = malloc(sizeof(Liste));

should be

C++

element = malloc(sizeof(Cellule));

You are allocating 4 bytes (on 32 bit platform) instead of approximatively 60 bytes.

The following line is also incorrect:

C++

en_cours=en_cours->succ;

Since you are Inside a function, the pointer is passed by value and a change inside the function has no effect outside of it. You need to have a pointer to a pointer to be able to update the pointer at the caller location.

You don't initialized new list to NULL so first insertion might fails because the pointer is garbage.

Philippe Mori

Thakur JAI SINGH13-May-15 23:31

Thakur JAI SINGH

13-May-15 23:31

Hi ,

I am using a dialog box and there are some text in the dialog box and want to copy that text from the dialog box .

Just want to know how to do it.

Richard MacCutchan14-May-15 1:22

Richard MacCutchan

14-May-15 1:22

See https://msdn.microsoft.com/en-us/library/windows/desktop/ms645489%28v=vs.85%29.aspx[^]. It really makes life easier if you read the documentation for the controls you use.

David Crow14-May-15 4:04

David Crow

14-May-15 4:04

Thakur JAI SINGH wrote:
I am using a dialog box...

So the dialog box is created and displayed via your code, or are you wanting to access a dialog box from some other app?

Thakur JAI SINGH wrote:
...and there are some text in the dialog box...

What type of control specifically?

Thakur JAI SINGH18-May-15 0:48

Thakur JAI SINGH

18-May-15 0:48

@DavidCroww

Dialog box is displayed via my code.

And there are lots of text on my dialog box and I have to copy the whole text available there on the dialog box.

MFC release and Debug build

David Crow18-May-15 2:21

David Crow

18-May-15 2:21

So if the dialog box belongs to your app, and you are populating the controls on it, then don't you already have access to the text?

bhushan050812-May-15 0:42

bhushan0508

12-May-15 0:42

Hi
I am trying to run a Legacy MFC application in Debug buil(earlier it was always built in Release Build (with debug info)). While loading resource using LoadToolBar() funtion ::FindResource fails while it succeeds in the Relase build. Can any body help me with this.

Thanks and Regards

Richard MacCutchan12-May-15 4:57

Richard MacCutchan

12-May-15 4:57

Without seeing the code that is in error it is impossible to guess what the problem may be.

Maximilien12-May-15 7:52

Maximilien

12-May-15 7:52

Probably uninitialized variables or invalid/NULL pointers.

Have a look at

Surviving the Release Version[^]

I'd rather be phishing!

Albert Holguin12-May-15 10:26

Albert Holguin

12-May-15 10:26

This is the opposite problem of what the OP stated.
OP stated: works in release, fails in debug
things you're referring to: work in debug, fail in release

Maximilien13-May-15 3:13

Maximilien

13-May-15 3:13

My mistake.

(the linked article can still offer hints and tips).

I'd rather be phishing!

C++ code to manage 3 keypads connected to one PC?

Albert Holguin12-May-15 10:30

Albert Holguin

12-May-15 10:30

When it comes to resources, it could be any number of things... if you make the call within a dll and not the main application, you have to make sure to have the resources of the main application loaded and not the dll's resources.

In any case, hard to tell without more info and some code.

Member 1167707911-May-15 10:50

Re: C++ code to manage 3 keypads connected to one PC?

11-May-15 10:50

3 users are connected to one pc using 3 usb keypads. A record is shown and each user have to input a number like 7.7 or 600 or 7.5 then they will press ENTER. Done.
So as an example problem: user2 starts to type 7 and user1 starts typing 5. the computer is already getting 75. You can see the problem.
I need a utility/code to isolate the input.
I have seen it in an auction software and also using xbox playing games.
In the auction software 3 black boxes are seen in the PC. Once a user starts the black box associated with that user, turn gray. Same as the other users. When all users have pressed ENTER, All boxes are revealed with the entries.
Until now we only had to enter one digit per box, so 3 keypads were no problem. The system right now have the 3 boxes in the screen.

Sascha Lefèvre11-May-15 11:45

Re: C++ code to manage 3 keypads connected to one PC?

11-May-15 11:45

This article presents a solution for this problem in C# but relies on P/Invoke-ing, so it should be rather easy to re-implement it in C++: Using Raw Input from C# to handle multiple keyboards[^]

I mentioned that article first because I know its solution works, but there are a lot more articles on keyboard hooking, some of which use C++, so there might be an even simpler solution for you:
https://www.google.com/search?q=codeproject++low-level+keyboard+hook+in+C%23&ie=utf-8&oe=utf-8#q=codeproject+keyboard+hook[^]

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1167707912-May-15 2:51

Re: C++ code to manage 3 keypads connected to one PC?

12-May-15 2:51

That is the best news I got. Thanks, many thanks.
It definitely address the objective. Now is time to digest all of it.
Thanks again. I will keep you posted

Sascha Lefèvre12-May-15 3:34

Re: C++ code to manage 3 keypads connected to one PC?

12-May-15 3:34

You're welcome! Good luck Smile | :)

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1167707912-May-15 4:01

Re: C++ code to manage 3 keypads connected to one PC?

12-May-15 4:01

Can you contact me?
How can I contact a member?

Sascha Lefèvre12-May-15 7:27

Re: C++ code to manage 3 keypads connected to one PC?

12-May-15 7:27

I would prefer it if you post follow-up questions here Smile | :)

That would probably also be more helpful for you, since I'm not too much into C++; so other members could help out then.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1167707912-May-15 8:34

Re: C++ code to manage 3 keypads connected to one PC?

12-May-15 8:34

I am not that good in c+++ and was hoping to find some one to help me to interface the code from Steve Messer and Emma Burrow.
It would be great to reach either one.
But it seems difficult.

Sascha Lefèvre12-May-15 8:57

Re: C++ code to manage 3 keypads connected to one PC?

12-May-15 8:57

In that case I would suggest to look at the other search results (articles) to find a solution that's already in C++

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 1167707912-May-15 9:01