How to detect GDI leaks with Purify for Windows?

[zonesoft]

Hi,

On a MFC application, I get 2 GDI Objects leaks everytime a file is opned and closed. I used a tool called GdiUsage and found out the leak occurs with the frame's icon. My doc class uses CMultiDocTemplate.

I am just wondering if I could use PurifyPlus for Windows (integrated into VC++ 6.0) to detect GDI leaks? It says "WinCheck" feature does detect GDI leaks, but I've been unable to see where that feature is.

If not, any other suggestion to detect GDI leaks?

Thanks a lot!

 

[Cagliostro]

could you please provide more information on what purify is?

Ion Filipski

 

[PerFnurt]

Purify is a quite powerful memory/resource etc analyzing tool (similar to Bounds Checker)

http://www-306.ibm.com/software/awdtools/purifyplus/

As for other means to detect GDI leaks - the most trivial (but I've found it useful anyway) is the Task Manager.

Task Manager->Menu->View->Select columns->Check GDI objects.

Run your app and see how its GDI object count is affected...

/Per

_{www.perfnurt.se}

 

[zonesoft]

Thanks for the replies. I already use the task manager. What I want to know is WHERE the GDI leaks occur in the code...

 

[Cagliostro]

Look in MSDN what functions creates or gets DC. There are pairs of GetDC/ReleaseDC, CreateDC/DeleteDC. See where DC are created and not deleted/released

Ion Filipski