?
Solved

Using GetSystemInfo() function from Win32API

Posted on 1998-06-17
3
Medium Priority
?
423 Views
Last Modified: 2012-05-04
When I call the function GetSystemInfo()from an OnButtonClick() function, I get "Unhandled Exception - Access Violation" Error when exiting the OnButtonClick()function. If I "comment out" the GetSystemInfo() function, the error goes away.
0
Comment
Question by:electrick
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 22

Accepted Solution

by:
nietod earned 400 total points
ID: 1166126
answer coming.
0
 
LVL 22

Expert Comment

by:nietod
ID: 1166127
I'm just going to take a guess here, but I suspect that you are not passing a pointer to an existing SYSTEM_INFO structure.  See you need to allocate a SYSTEM_INFO structore (globally, lovcally, or dynamically, but local is the ussual way) and pass a pointer to that structure.  Then windows will fill in the structure.  You should do something like

SYSTEM_INFO SysInf;
GetSystemInfo(&SysInf);

you should not do

SYSTEM_INFO *SysInfPtr;
GetSystemInfo(SysInfPtr);

that will cause an exception because the pointer passed doesn't actually point to a SYSTEM_INFO structure.  It is just a random pointer.

0
 

Author Comment

by:electrick
ID: 1166128
You are correct Sir. It worked !
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When writing generic code, using template meta-programming techniques, it is sometimes useful to know if a type is convertible to another type. A good example of when this might be is if you are writing diagnostic instrumentation for code to generat…
Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

800 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question