http://blogs.msdn.com/jamesfi/archive/2007/05/30/finding-where-a-bad-hresult-is-returned.aspxI've looked at this a couple times , but here's another way to break when the error code you're looking at is being returned. .while(@eax != 0xc0000005) { t ; reax } If you want to avoid the output noise, you can do something like this: .while(@eax !=en-USCommunityServer 2.1 SP1 (Build: 61025.2)