To get a trial key
fill out the form below
Team License (a basic version)
Enterprise License (an extended version)
* By clicking this button you agree to our Privacy Policy statement

Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

Free PVS-Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
Obsolete descriptions of functions in M…

Obsolete descriptions of functions in MSDN taking no account of 64 bits

Apr 05 2013
Author:

MSDN is a large knowledge base, so maintaining and keeping it up-to-date is an extremely difficult and perhaps almost impossible task. In forums, there are many questions asked by programmers who are involved into 64-bit software development and who are embarrassed by descriptions of some functions in MSDN.

For example, take the discussion "MSDN 64-bit issue". Figure 1 is a screenshot showing the description of the function CListCtrl::SetItemData in the on-line version of MSDN. Although this post is being written in 2010, the function description is still incorrect. And it is most likely that many other MSDN materials are still obsolete from the viewpoint of 64 bits.

k0017_MSDN_64_bit_issues/image1.png

Figure 1 - Description of the function CListCtrl::SetItemData in MSDN Library Online

Only the argument was changed in the description of the function CListCtrl::SetItemData. The type of the parameter dwDara was changed from DWORD to DWORD_PTR. It is the same with the description of the function GetItemData. Perhaps this modification was made in some automated mode relying on the new header files. But the descriptions of the functions themselves remain obsolete and mention the "32-bit value".

Here is a question. Maybe the function prototype has been changed but the function still saves data in the 32-bit mode? We may answer "no" relying on the following reasons:

1) Logical reason. You often need to associate rather many data with a list item. In this case the data are untied into a structure and the pointer assigned to it is saved into the function SetItemData. Win64 API developers could not have deprived programmers of this capability, so the function must be able to store 64-bit pointers.

2) Practical experiment:

list.SetItemData(0, 0x1111111122222222ui64);
DWORD_PTR value = list.GetItemData(0);
if (value == 0x1111111122222222ui64)
  MessageBox(_T("OK"));

Successful launch of this code in a 64-bit application confirms that SetItemData can store 64-bit values.

Conclusion. Descriptions of SetItemData, GetItemData and some other functions in MSDN Library are obsolete. MSDN materials are regularly updated and perhaps the error we have described here is corrected by now. But if you have encountered such a case, try experiment to check the properties of the function you are dealing with.

Popular related articles
Characteristics of PVS-Studio Analyzer by the Example of EFL Core Libraries, 10-15% of False Positives

Date: Jul 31 2017

Author: Andrey Karpov

After I wrote quite a big article about the analysis of the Tizen OS code, I received a large number of questions concerning the percentage of false positives and the density of errors (how many erro…
Free PVS-Studio for those who develops open source projects

Date: Dec 22 2018

Author: Andrey Karpov

On the New 2019 year's eve, a PVS-Studio team decided to make a nice gift for all contributors of open-source projects hosted on GitHub, GitLab or Bitbucket. They are given free usage of PVS-Studio s…
PVS-Studio for Java

Date: Jan 17 2019

Author: Andrey Karpov

In the seventh version of the PVS-Studio static analyzer, we added support of the Java language. It's time for a brief story of how we've started making support of the Java language, how far we've co…
The Evil within the Comparison Functions

Date: May 19 2017

Author: Andrey Karpov

Perhaps, readers remember my article titled "Last line effect". It describes a pattern I've once noticed: in most cases programmers make an error in the last line of similar text blocks. Now I want t…
How PVS-Studio Proved to Be More Attentive Than Three and a Half Programmers

Date: Oct 22 2018

Author: Andrey Karpov

Just like other static analyzers, PVS-Studio often produces false positives. What you are about to read is a short story where I'll tell you how PVS-Studio proved, just one more time, to be more atte…
Static analysis as part of the development process in Unreal Engine

Date: Jun 27 2017

Author: Andrey Karpov

Unreal Engine continues to develop as new code is added and previously written code is changed. What is the inevitable consequence of ongoing development in a project? The emergence of new bugs in th…
Technologies used in the PVS-Studio code analyzer for finding bugs and potential vulnerabilities

Date: Nov 21 2018

Author: Andrey Karpov

A brief description of technologies used in the PVS-Studio tool, which let us effectively detect a large number of error patterns and potential vulnerabilities. The article describes the implementati…
The Ultimate Question of Programming, Refactoring, and Everything

Date: Apr 14 2016

Author: Andrey Karpov

Yes, you've guessed correctly - the answer is "42". In this article you will find 42 recommendations about coding in C++ that can help a programmer avoid a lot of errors, save time and effort. The au…
The way static analyzers fight against false positives, and why they do it

Date: Mar 20 2017

Author: Andrey Karpov

In my previous article I wrote that I don't like the approach of evaluating the efficiency of static analyzers with the help of synthetic tests. In that article, I give the example of a code fragment…
PVS-Studio ROI

Date: Jan 30 2019

Author: Andrey Karpov

Occasionally, we're asked a question, what monetary value the company will receive from using PVS-Studio. We decided to draw up a response in the form of an article and provide tables, which will sho…

Comments (0)

Next comments
This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept