Click here to Skip to main content

Submit your article

VC++

VisualC++

Great Reads

How to Make Your Own Sandbox: Simple Sandbox Explained

by Eugene Balabanov

A tiny sandbox primer

Simulator 6 Axis Articulated Robots

by jurhas

A small simulator for a 6 axis articulated robot

Interoping .NET and C++ through Registration-free COM

by Marius Bancila

Using managed COM objects in C++ without registering the server in Windows Registry

Weiler-Atherton Algorithm in MFC

by Petrov Vladimir

Weiler-Atherton algorithm in MFC codes demo implementation

Latest Articles

by Ștefan-Mihai MOGA

Task Manager shows you the programs, processes, and services that are currently running on your computer. You can use Task Manager to monitor your computer’s performance or to close a program that is not responding.

IntelliFile - An Alternative Windows Version to the Famous Total Commander

by Ștefan-Mihai MOGA

This article is about the IntelliFile application which is a free alternative Windows version to Total Commander and uses many components that have been published on CodeProject.

by Ștefan-Mihai MOGA

You can use IntelliPort to transfer large files from a computer onto your portable computer using a serial port rather than going through the process of setting up your portable computer on a network.

Compiling WinQEMU v0.10.2 using Visual Studio 2008 and Visual Studio 2012

by Tough Developer

How to compile WinQEMU v0.10.2 in VS2008 and VS2012

All Articles

VC++

How to Make Your Own Sandbox: Simple Sandbox Explained

2 Oct 2016 by Eugene Balabanov

A tiny sandbox primer

Simulator 6 Axis Articulated Robots

7 Apr 2014 by jurhas

A small simulator for a 6 axis articulated robot

microcontroller

Interoping .NET and C++ through Registration-free COM

2 Aug 2017 by Marius Bancila

Using managed COM objects in C++ without registering the server in Windows Registry

Weiler-Atherton Algorithm in MFC

25 Feb 2018 by Petrov Vladimir

Weiler-Atherton algorithm in MFC codes demo implementation

Designing the Interface of DLLs in C/C++ Projects

19 Feb 2016 by pasztorpisti

An advice to make your DLL interface more attractive and easier-to-maintain even in cross-platform projects

Building and configuring OpenSSL in Visual Studio (MSBuild).

30 Mar 2015 by Eugene Sadovoi

Integrating third party tools and libraries into Visual Studio (MSBuild) configuration environment.

Section Handles Enumeration. Extending File Unlocking

19 May 2015 by Yohamnes Hernandez

How to free blocked files, inclusive if they are mapped in memory. Something that many tools are missing.

Allocating Memory in C/C++: How to Avoid Memory Mismatched Allocation/Deallocation Issues Detected by Intel® Inspector XE for Visual Studio 2015

1 May 2017 by Arthur V. Ratz

This tip/trick introduces the basic ideas on how to avoid memory mismatched allocation/deallocation issues detected by Intel® Inspector XE for Visual Studio 2015

Dynamically Sized Struct

6 Nov 2014 by Orjan Westin

Simplifying the use of dynamically sized C structs

DMath is DirectXMath for All

5 Mar 2017 by Jose A Pascoa

Part 1 - Using DMath from C#

what is PostMessage?

27 Jun 2012 by Chuck O'Toole

It is one of the oddities of Windows Naming that "SendMessage()", unlike TCP/IP "send()", is not a "fire and forget" message passing mechanism.SendMessage() is an immediate dispatch to the target window's (HWND) message handling and does not return until the message processing is complete...

SAL 2 Function Parameters Annotations

16 Apr 2015 by Daniel Rose

Explanation of the different SAL annotations for function parameters for Visual Studio Code Analysis

Use mplayer as our Audio Decoder – Part 2

12 Dec 2011 by jackyxinli

This article demonstrates how to use mplayer as an audio decoder and display real time spectrum during playback process

what is PostMessage?

27 Jun 2012 by Albert Holguin

Messaging is the basic way within the MS framework to get information between windows (of course, you don't have to necessarily be a window to get/send a message).The two basic methods, SendMessage() and PostMessage() are similar (in prototype) but very different in behavior. SendMessage()...

A 2D List Implementation in MASM Assembly

27 Feb 2016 by John Jiyang Hou

A List data structure implementation in MASM Assembly with C function realloc

Is returning a new object without casting is risky ?

29 Sep 2011 by André Kraak

If there is any risk it is that the caller of the function may not delete the returned object, creating a memory leak.So document the function properly (which you should always do) and state that the caller is responsible for cleaning up the returned object.

Difference between function pointers and pointer to function

12 Dec 2013 by Aescleal

They're synonymous - "a function pointer" and "a pointer to a function" describe an object that can hold the address of a function.

Flexible Particle System - Emitter and Generators

16 May 2014 by Bartlomiej Filipek

Description of my emitter and generator module for particle system

A Tiny Custom List Control

25 Aug 2014 by HateCoding

A tiny custom list control

custom-controls

Collision Proof Shared String Resources

12 Jul 2016 by David A. Gray

Share Win32 string resources without the risk of conflicting resource IDs

Is returning a new object without casting is risky ?

29 Sep 2011 by Richard MacCutchan

Looking at the description of the new[^] operator, I would say you are doing it correctly. Since you are returning an object of the type that the Create() function says it will return, you will not need any casting within this code.

Timer does not tick less than 15 milliseconds

20 May 2012 by OriginalGriff

Windows timers generally run off the hardware timer, which has a resolution of 10 - 15ms (depending on the hardware, most run at 15.6ms intervals) so when you ask for a lower interval, you get an accuracy of 10ms in teh timer value, but a resolution of 15ms in the timer interval.There is an...

Help needed in breaking infinite loop

20 Jun 2012 by OriginalGriff

The break statement causes execution of the loop to end immediately:while(1==1) { xxx(); if (condition) { break; } }[edit]Typo: "1=1" instead of "1==1". Thanks johannesnestler! - OriginalGriff[/edit]

Why copy constructor is passed by reference not by pointer

12 Dec 2013 by Stefan_Lang

Some of the truth has been revealed in Solutions 1 and 2 (please ignore 3), but one of the reasons is that this allows you to pass things that can be converted or evaluated to your class type, such as expressions, without having to provide a temporary variable yourself.class cVec...

AppRunner – Simple ‘desktop shortcut’ replacement

8 Feb 2015 by tkontos

A WTL based, XML driven shortcut replacement

Memory Allocation Tracking for C++ Code

1 Nov 2020 by Rick York

A Handy Memory Allocation Tracking Macro and Header for Visual Studio C++ Code

AMR Audio Encoding

17 Feb 2012 by potluri_suresh

Raw Audio data is encoded to AMR-NB audio using opencore-amr library

How to get current function return type using __FUNCDNAME__

2 May 2012 by Itai Basel

A macro that gets current function's return type on visual C++

MFC OnLButtonUp issue

17 May 2012 by Pablo Aliskevicius

This behavior is by design ;)It has something to do with allowing the user to drag things from one application and drop them on another.There are other mouse messages that may do the trick for you. You may start here:WM_MOUSEMOVE[^]; you can check the flag MK_LBUTTON and see when it is...

how to convert LSB to MSB and MSB to LSB

13 Jun 2012 by Aescleal

htons() is your friend. And portable. It converts from the byte order of the host to a a network formatted short.There's an htonl if you ever need to do the same thing with 32 bit data.

how to convert LSB to MSB and MSB to LSB

13 Jun 2012 by Niklas L

When transmitting data over a network, you should use host-to-net functions to make sure you always send it in a systematic way. Look here htons()[^] and here ntohs()[^] to get it back again.

C++ Pointer/Heap Problem

13 Jun 2012 by Aescleal

You're doing pointer manipulation on pointers to dynamically allocated memory. This has a couple of effects: - you're orphaning blocks of memory - you couldn't free R1, even if you wanted to - as Albert said you're overrunning an array somewhere. You're not assigning xa anywhere for one...

Drawing shapes using MFC on a dialog box

14 Jun 2012 by Espen Harlinn

Have a look at:Dialog Painting in MFC[^] - this shows how trigger the paint event for your dialog.This shows how to do the drawing:GDI Circle-Based Shapes[^] - see the "Pies" example.Best regardsEspen Harlinn

Problem reading a recorded file.

3 Jul 2012 by OriginalGriff

Why are you assigning a new, empty CString to the buffer and then reading into it?CString* databuf; //buffer to hold the data from the file.databuf = NULL;databuf = new CString;...int iRead = my_file.Read((void*)databuf, my_file.GetLength());//error hereSurely, assigning a buffer...

Problem reading a recorded file.

3 Jul 2012 by barneyman

you're using CString incorrectlyIt does not represent an object with a buffer that you can scribble into ...change it tochar *databuf=new char[my_file.GetLength()];inside the .Open clauseand make sure you delete it on the way out

jpeg image in visual c++ application

5 Jul 2012 by Eugen Podsypalnikov

// How to load jpeg and bmp both type of images in Visual c++ 6 in MFC dialog based application?Try CImage::Load(..)[^] :)

Print screen issue in a pc without moniter [Windows platform]

8 Jul 2012 by Jochen Arndt

You may connect a 'DVI Dummy' (Google for it) that simulates a monitor to be attached to the graphics card.For a VGA port see this VGA Dummy[^] solution.You may also try ZoneScreen which is designed to extend desktops over network connections. It contains a virtual graphics card with...

loading byte array data into pdf file

11 Jul 2012 by Richard MacCutchan

You seem to be confused about what binary data actually is. If you read a PDF as a byte array and store it in the database, then you must retrieve it in exactly the same way (and write it as such to any new file). Converting it into a string just destroys the structure so it becomes unreadable...

Is the thread pool available in VC++?

17 Sep 2012 by Kuthuparakkal

Follow:Win32 Thread Pool[^]Also MS way:http://msdn.microsoft.com/en-us/magazine/hh335066.aspx[^]

Is the thread pool available in VC++?

17 Sep 2012 by Espen Harlinn

As of Vista, Windows has built in support for thread pools. Take a look at CreateThreadpool[^]Best regardsEspen Harlinn

Problem with MessageBox

20 Dec 2012 by CPallini

In a C++ program using MFC you may use either the Windows API function MessageBox[^] or the MFC method CWnd::MessageBox[^].The former takes four parameters, the latter may take three, two or just one parameter (because it has two optional parameters). In your dialog application you are...

Flicker happen in display form when drawing

26 Mar 2013 by nv3

Instead of painting directly to your control you could create an equally sized memory DC and bitmap and paint into that. Then, when ready, just bitblt the currently visible part to the DC of the control. That has several advantages:- drawing to a memory bitmap is faster than drawing to the...

ShellExecute function is not give expected result.

8 Apr 2013 by Steve44

I think this will not work the way you tried it, using set within the cmd.exe shell, the change will not be globally visible.Try the setx.exe command, this will provide a change of the environment variable that is available to other processes.See...

GetErrorInfo returns S_FALSE in WIN32 API

2 May 2013 by Jochen Arndt

See GetErrorInfo[^] in the MSDN:Quote:Obtains the error information pointer set by the previous call to SetErrorInfo in the current logical thread.If you got the return valueQuote:S_FALSE There was no error object to return. , no error info has been set by a COM function which is obvious...

Set unsigned character value to CString type edit control in mfc

18 Jun 2013 by Jochen Arndt

You are reading a single character (byte) into Buff. So you can't pass Buff where a NULL terminated string parameter is expected without appending the NULL terminator. Your code snippet indicates also that you are using a Unicode build. So the characters read from the serial port must be...

Multi producer/consumer threads with condition variables...why don't work well?

8 Jul 2013 by pasztorpisti

To be honest I haven't checked out all your code just check out what synchronization primitives are you using in coda_concorr and that is already suspicious. The same is true for your thread funcs that use ugly lockings and antipaterns like "try". You are not using the right synchronization...

What does __cdecl *_PVFV stands for?

8 Sep 2013 by pasztorpisti

This is a function pointer declaration. typedef void (*_PVFV)(void); defines _PVFV as a function pointer type. The __cdecl keyword is there to define the calling convention of the function to use C calling convention[^].

Minimal Undo - An Undo/Redo Framework

26 Jun 2014 by zdf

A solution for conversion of a non-undoable application to an undoable one.

Use Webclient to Make An Auto Updater

17 Sep 2014 by BlueMaple_chief

To make a simple auto updater demo, I use webclient 'interfaces' to download the file and monitor the progress.

Geert van Horrik's 'Updater' in Visual Studio Community Edition With Small Changes

30 Nov 2014 by David O'Neil

I needed an 'Update' solution for a project, and modified Geert van Horrik's 'Updater' to do so. This is the solution in Visual Studio Community Edition

MSVCP100D.dll is missing

2 Feb 2015 by Sergey Alexandrovich Kryukov

Unfortunately, you created dependency on the Visual Studio specific libraries. First thing you did wrong is: you created an application in Debug configuration (I can see it from the DLL name) and deployed it. You should not do it; always build Release configuration to deploy. Please...

Any possible issues if const char * is converted to char * in a function call

7 Mar 2015 by OriginalGriff

Yes.A const char* can't be converted to a char* because it would open up the possiblity of changing the value of constants: in this case potentially changing (say) a user prompt from "hello user!" to "HeLlO UsEr!" and making the fixed prompt change half way through the program.If you need to...

Using Manifest Settings for VC6 buildchain

15 Apr 2015 by D4rkTrick

Get manifest support with VC6

Can we put exception handling inside the constuctor

26 Jul 2015 by Afzaal Ahmad Zeeshan

Read my comment to the question, continuing from there. Remember, constructors are also functions. So, when you create a custom constructor logic you are basically trying to set up the underlying objects. If they are exposed to some errors and would work in a condition only, then yes. You need...

Can we put exception handling inside the constuctor

26 Jul 2015 by Sergey Alexandrovich Kryukov

In addition to Solution 1: The answer could be more certain: yes and no. :-)First of all, from your question, it is not clear what you are talking about. You are talking about handling exceptions, and in other place you are talking about throwing. Let's discuss throwing first.Of course,...

How can I define C++ class memebers in the .h header file with Visual Studio 2013?

24 Jan 2016 by nv3

I think you are confusing a few things here.DeclarationIn a declaration you just tell the compiler what the data type of a member, variable or function is, or which members and functions a class consists of. For example: int i; void MyFunction (int i, double d); class...

Unicode version of getline function

1 Nov 2021 by Michael Haephrati

I stumbled upon this question while trying to understand why I get gibberish text when I convert PDF files into text, as part of this [^] project. This question is still relevant today, and there is no real answer. An ideal answer would be the...

Segmented Map, a Compromise Between Flat Map and std::map

18 Sep 2022 by Mikhail Semenov

This article proposes a mapping algorithm, called Segmented Map, which is almost as fast as Flat Map is random access and enumeration of elements and close to std::map in insertion of elements.

Using MFC CFolderPickerDialog

24 May 2015 by JPhelps

Using CFolderPickerDialog

how to save a printer hdc to image

13 Jun 2011 by TRK3

The problem probably isn't in the code you posted. It's probably in how/when you are calling it. I would suspect that the printer hdc may not point to what you think it's pointing to at the time you call your routine.You don't say what the error is that you are getting. (That...

how to redirect url in c++/cli

10 Jul 2011 by Ashish Tyagi 40

I guess you already have that list of blocked sites and you are writing code for block them and redirect to your default redirecting site.. It is a very basic functionality of a standard firewall... Well for blocking or allowing any site requested from the browser you must capture those...

How to close an DoModal dialog box and all its childs from the parent dialog box

26 Jul 2011 by Eugen Podsypalnikov

Some parent could close its children members as well... :)/*afx_msg for WM_CLOSE*/void CParentDlg::OnClose(){ // CChildDlg CParentDlg::m_cChildAlert if (m_cChildAlert.GetSafeHwnd()) { m_cChildAlert.SendMessage(WM_COMMAND, IDCANCEL); } CDialog::OnClose();}

Application is getting very slow.

11 Oct 2011 by André Kraak

Building on Mehdi solution.If you indeed have a memory leak have a look at this on Visual Leak Detector - Enhanced Memory Leak Detection for Visual C++[^] how to solve it.

MailShot: From Client to Server (With Love)

7 Jan 2012 by ThatsAlok

Simple tip and trick for Mail Slot

deploy a VC++10 app into a XP system without SP2

22 Jan 2012 by Espen Harlinn

Now it is mandatory to install the same * application to a windows XP computer without the service pack 2 installed and it seems that I can't install that service pack there.I'd try to convince the customer to upgrade XP to service pack 3. MS has made a serious effort when it comes to...

Port C++ code from VC6 to VS2010

1 Feb 2012 by Espen Harlinn

My advice would be to move it to VS2010.Start out by planning - it just might be that you would like to refactor some of your code, and if you're moving the code to a more modern version of C++, you should proably think things through.Before you start, there are a few libraries that I...

How to create web filter in C# or VC++

24 Feb 2012 by Chandrakantt

You can find LSP sample in windows SDK at location "(Drive Letter)\Program Files\Microsoft SDKs\Windows\v7.1\Samples\netds\winsock\lsp" if you have 7.1 Microsoft SDK. If you have Vista SDK then it will be at location "(Drive Letter)\Program Files\Microsoft...

I'm getting a \.\ in the path using GetModuleFileName...

11 Apr 2012 by Sergey Alexandrovich Kryukov

The path "c:\projects\my_app\.\Debug" is perfectly legal and is equivalent to "c:\projects\my_app\Debug".Try the following commands:cd c:\projects\my_app\.\Debugand cd c:\projects\my_app\DebugYou will see that they change working directory to the same place, if the path exists.If...

Splitting a char * over "->"

30 Apr 2012 by OriginalGriff

That is because strtok matches any of the characters as delimiters, rather than all of them: http://www.cplusplus.com/reference/clibrary/cstring/strtok/[^]Have a look at strstr instead: http://www.cplusplus.com/reference/clibrary/cstring/strstr/[^] - you will have to call it repeatedly, but...

how to make a modal dialog box in vc++ MFC?

4 Jun 2012 by Richard MacCutchan

You can start by reading the documentation for the CDialog[^] class, which will give you the basics. Then try the CodeProject articles[^] for lots of useful samples.

How to read and write on SERIAL PORT

20 Jun 2012 by Sergey Alexandrovich Kryukov

I hope this CodeProject article can help you:Serial library for C++[^].Basically, you need to use the class CSerial. Do you use it? This CodeGuru article provides a short overview of its...

How to read and write on SERIAL PORT

20 Jun 2012 by Jochen Arndt

A serial port can be opened by only one thread/application at time. So an attempt to open COM1 by your write application will fail if the port is already opened by the read application. It is always good practice to check the return value of CreateFile() for INVALID_HANDLE_VALUE and call...

How to create multicolumn ListBox

26 Jun 2012 by Espen Harlinn

Multi column listbox is not what you want:Item1 Item4 Item7item2 Item5Item3 Item6Try using a CListCtrl[^] or perhaps the MFC Grid control 2.27[^]Best regardsEspen Harlinn

UpdateData(False) is not working in Thread?

4 Jul 2012 by Code-o-mat

Call UpdateData only from the same thread that created the dialog and its controls (the GUI thread), not from any worker threads. If you want to update your dialog regularly, either use a timer (SetTimer[^]/CWnd::SetTimer[^]) or send/post (SendMessage[^]/PostMessage[^]) messages towards your...

Print screen issue in a pc without moniter [Windows platform]

9 Jul 2012 by shankha2010

Hi All, I want to extract some data from a flash website by OCR[Optical Character Recognition] programmatically.By taking Internet explorer handle and navigating to apage and taking screenshot of it.Everything went fine until I scheduled it in a server that have no monitor.Any Idea...

GetVolumePathNamesForVolumeNam...

24 Jul 2012 by Jochen Arndt

Your code fails because there are two versions of the function: An ANSI version and an Unicode version. According to the Unicode setting, you must pass 'GetVolumePathNamesForVolumeNameA' or 'GetVolumePathNamesForVolumeNameW' to GetProcAddress().

Can u tell whats the problem in the below function

1 Oct 2012 by Richard MacCutchan

You seem to be struggling with some of the basic concepts here and getting a bit confused about what needs to be done. There is no need to keep copying data from one place to another just so you can write it out. Try something like:char szDateTime[12];int recordLength = 138; // this...

Working with Windows Registry

17 Oct 2012 by Quirkafleeg

Hello there.Simple answer is no - you can't add an xml file to the windows registry... at least not in the way you are thinking.What you can do is add the xml file content to the registry, as a string value. For such a task, using RegSetValueEx is the way to go:1) Read the content of your...

Visual c++please help...?

4 Feb 2013 by CPallini

If you need to change the content of a file (that is overwrite it) then you have to:Read the file content into memory.Modify memory content.Write back modified memory content to the original file.You may use the C++ fstream to read/write a binary file, see, for instance Input/Output with...

Share funtionality between two other applications

12 Feb 2013 by Albert Holguin

I place GUIs in dlls all the time... you just have to set the resources handle correctly when you create the windows within the dll and everything else pretty much works the same.Here's some...

how to find the difference between two given dates

11 Mar 2013 by Prasad_Kulkarni

Try this:#include #include "boost/date_time/gregorian/gregorian.hpp"namespace bdt = boost::gregorian;int main(void){ bdt::date today(bdt::date(2010, bdt::Jun, 13)); bdt::date electionDay(bdt::date(2010, bdt::Nov, 2)); bdt::date_period range(today,...

Flicker happen in display form when drawing

26 Mar 2013 by Sergey Alexandrovich Kryukov

The technique of elimination flicker is called "double buffering".Please see this CodeProject article: Flicker Free Drawing In MFC[^].See...

About buttonclicked event

3 Apr 2013 by Sergey Alexandrovich Kryukov

You can do it, if you use the process handle returned by each ShellExecute; then you can use the function WaitForMultipleObjects:http://msdn.microsoft.com/en-us/library/windows/desktop/ms687025%28v=vs.85%29.aspx[^].This function call will be a blocking call. Your calling thread would be...

C++ Convert from int to long int strange act

11 Apr 2013 by CPallini

The following code typedef long int int32_t;typedef int32_t cell;#include cell foo(){ int xz; xz = 150; return xz;}int main(){ printf("%ld\n", (long)foo()); /* long int ! */ return 0;}outputs: 150

How to solve error: Heap block at 007A8530 modified at 007A860A past requested size of d2?

12 Apr 2013 by Jochen Arndt

I did not see the source for the heap error but you also asked for the right or simpler way. At first you should know that the HTML clipboard format must contain UTF-8 encoded text. So the input text must be converted to UTF-8 and prefixed with the HTML format header. A snippet from one of my...

generating a binary string with weird character in VC++

23 Apr 2013 by CPallini

Such a string does not represent 'weird characters', in my opinion (it represents the following character sequence "000T102 000").You have to: convert the string into an array of unsigned chars (each ordered pair of characters of your string represent an unsigned char)write the unsigned char...

How to resolve error C2059

2 May 2013 by Ian A Davidson

http://msdn.microsoft.com/en-us/library/t8xe60cf(v=vs.80).aspx[^]

Help to find out the Week number of year?

13 May 2013 by H.Brydon

The week number comes from the %W spec. For example: CString sDir = COleDateTime::GetCurrentTime().Format( "\\%Y\\%W" ); [without looking] I think you will get further information if you look at the help for strftime().

Help to find out the Week number of year?

14 May 2013 by Ian A Davidson

Of course, looking at my WHS diary, I realised that the first of January is not always in week 1, but is sometimes week 52/53 of the previous year, and also the last few days of December may be counted as the first week in the next year.Thus all the solutions given so far, while some of them...

dir.h file problem in vc++

11 Jun 2013 by Maximilien

you can use _makepath[^].

Image Rotation with 1 degree precision using OpenGL

19 Jun 2013 by JackDingler

Most of it can be done in OpenGL.Loading and saving images isn't an OpenGL function though.To do this you need to load the bitmap into memory.Create a destination bitmap in memory.Set Open GL to render to your destination bitmap.Apply the original bitmap as a texture to a square...

curruption of the heap

2 Jul 2013 by Ron Beyer

Part of your problem is here: int num=0; s=new students[num];you are creating a new array of students that's zero elements long. So every time you advance the pointer you are corrupting memory. You need to allocate as many elements as you are going to use, or use some sort...

Report as writing in word document using VC++

28 Jul 2013 by pasztorpisti

My opinion is that using simple stupid and open formats is the better choice. The binary closed office only document format would be my last choice if I have other better choices. The binary format also has the disadvantage that even different office versions display it differently in contrast...

VC++ Common Versioning

31 Jul 2013 by shailesh91082

This article explains how to implement Common Versioning Mechanism which helps in easy maintenance of product

Getting error as "Someone.exe: 0xC0000005: Access violation reading location 0x00000010."

16 Aug 2013 by pasztorpisti

This is basically a NULL pointer exception. Its 0x10 and not zero because you are using the NULL pointer as a pointer to a struct/class and you are trying to access a member of that struct/class that is on offset 0x10 inside the struct/class. Still it is a NULL pointer "exception".The bug is...

How to copy a structure data union

17 Sep 2013 by Philippe Mori

Since POD struct can be copied directly, why not uses the simpler code:UESim.S = *SE;This is generally safer to write the code that way as you don't have to bother to know if the structure is bitwise copyable as the compiler will do the proper thing (bitwise copy for any member that do...

How to kill this thread, Can you explain create and exit thread. I am working on VC++,Windows thread

15 Oct 2013 by User 59241

ExitThread is the preferred method of exiting a thread in C code. However, in C++ code, the thread is exited before any destructors can be called or any other automatic cleanup can be performed. Therefore, in C++ code, you should return from your thread function.From msdn:TerminateThread...

multi-threading

How to kill this thread, Can you explain create and exit thread. I am working on VC++,Windows thread

6 Nov 2013 by Bill_Hallahan

You can have the launched thread routine contain code that causes the thread routine to return. This will automatically cause ExitThread to be called. Your code can wait on the thread handle using the WaitForSingleObject function and when EndThread is called, WaitForSingleObject will unblock. ...

multi-threading

Constructor in private section

23 Oct 2013 by Captain Price

Yes it is possible to declare constructors as private. When you declare the constructor as private, you cannot directly instantiate the class from outside. And from only the inside of the class you can create an object of itself. You use static functions for this.Some examples: 1....

OpenCV the best method to access pixel value in a binary image (Mat)

27 Nov 2013 by User 59241

It is always easier if you post your own code. This is straight out of the documentation:cv::Mat img = cv::imread("lenna.png", 0);if(img.at(y,x) == 255)etchttp://docs.opencv.org/doc/user_guide/ug_mat.html[^]