Tuesday, October 11, 2005

MFC applications leak GDI objects?

We've discovered a GDI leak in the Prosolv Analyzer application, but it appears to be a Microsoft leak rather than a Prosolv leak. According to this KB article, creating and destroying child windows with Windows XP Service Pack 2, with themes turned on, causes objects to be leaked. The article says that a hotfix is available, but it has to be downloaded rather than automatically retrieved via Windows Update. It seems pretty strange to me - why don't people hit this bug all the time? Are there just that many fewer MFC applications on the market now? Or are there some subconditions for use that mean that it doesn't come up all that often? Or maybe it's just that most applications don't create that many child windows. Anyway, if you're running Analyzer, you might be wise to get the patch mentioned in the KB article applied, or turn off the Themes service. We're looking into our options.

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