[Webinar] Streamline your web hosting managementRegister Today

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 331
  • Last Modified:

GDI failure/SelectObject problem

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
quinlan
Asked:
quinlan
1 Solution
 
Tommy HuiEngineerCommented:
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
 
quinlanAuthor Commented:
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

The 14th Annual Expert Award Winners

The results are in! Meet the top members of our 2017 Expert Awards. Congratulations to all who qualified!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now