Solved

GDI failure/SelectObject problem

Posted on 1998-01-14
2
312 Views
Last Modified: 2013-12-26
I have a problem with the win32 OWL app that I am writting.

When Codeguard is turned on, I get an error whenever I call the SelectObject parameter of a TDC.

Without Codeguard, I occassionally get program crashes and occassionally SaveDC returns 0. The crashes are always GDI failures.

I have a lot of (sometimes nested) code that looks something like this:

dc.SaveDC( );
dc.SelectObject( GetTitleFont( ) );

...

dc.RestoreFont( );
dc.RestoreDC( );

Any ideas?
0
Comment
Question by:quinlan
[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 Comments
 
LVL 15

Accepted Solution

by:
Tommy Hui earned 300 total points
ID: 1299540
Don't use SaveDC() and RestoreDC() if possible. They are provided for backwards compatability and they break OWL's references on objects. Instead, remove those calls and you should find that things work better. OWL's TDC classes already have the ability to save the DC state and automatically restores it afterwards.


0
 

Author Comment

by:quinlan
ID: 1299541
What do you mean by "OWL's TDC classes already have the ability to save the DC state and automatically restores it afterwards."
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
CSS HELP 6 103
Swiper slider stops between pages 11 54
site launch date and last modified date 3 109
Problem to ToolkitScriptManager 2 86
Preface This article introduces an authentication and authorization system for a website.  It is understood by the author and the project contributors that there is no such thing as a "one size fits all" system.  That being said, there is a certa…
I will show you how to create a ASP.NET Captcha control without using any HTTP HANDELRS or what so ever. you can easily plug it into your web pages. For Example a = 2 + 3 (where 2 and 3 are 2 random numbers) Session("Answer") = 5 then we…
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:
The viewer will learn how to count occurrences of each item in an array.

734 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