Solved

resource leak

Posted on 1998-12-15
4
191 Views
Last Modified: 2010-05-03
hi everyone

smart check uncovered a resource leak error in my creation
of logical fonts.  before i call createfont, i have this:

if fonttouse<>0 then
      rc = deleteobject(fonttouse)
      fonttouse = 0
endif

i tried tracing the value of fonttouse, after the deleteobject line
the value of fonttouse still remained, that's why i added the
"fonttouse = 0" line.  

does anyone know how deleteobject really works?  i don't know
why the value of fonttouse remains after that function is called.  
by the way, i got that part from dan appleman's winapi book,
chapter 11 - fonts.

any help welcome
thanks in advance

merry christmas to all
0
Comment
Question by:janeausten
[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
  • 2
4 Comments
 

Author Comment

by:janeausten
ID: 1450378
Edited text of question
0
 
LVL 8

Expert Comment

by:MikeP090797
ID: 1450379
The value shouldn't change, it represents the handle of the object, not the actual object. For instance, if the variable contains 3, you could simply pass 3 instead.
The font is not being freed probobly because it is still selected into the device context. You must select a different font (You can use GetStockObject for that), and only after that use DeleteObject.

If this was the case, please reply, and I will post the comment as an asnwer
0
 

Author Comment

by:janeausten
ID: 1450380
Yep, mike, i think that's it...

repost your comment and get your points

and..

THANKS!
0
 
LVL 8

Accepted Solution

by:
MikeP090797 earned 200 total points
ID: 1450381
The value shouldn't change, it represents the handle of the object, not the actual object. For instance, if the variable contains 3, you could simply pass 3 instead.
The font is not being freed probobly because it is still selected into the device context. You must select a different font (You can use GetStockObject for that), and only after that use DeleteObject
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say 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

Enums (shorthand for ‘enumerations’) are not often used by programmers but they can be quite valuable when they are.  What are they? An Enum is just a type of variable like a string or an Integer, but in this case one that you create that contains…
I was working on a PowerPoint add-in the other day and a client asked me "can you implement a feature which processes a chart when it's pasted into a slide from another deck?". It got me wondering how to hook into built-in ribbon events in Office.
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

762 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