I am developing a Browser Helper Object running inside Internet Explorer. I am writing debugging messages with ATLTRACE("..."); These appear fine when Visual Studio is attached to the iexplore.exe process, but this is slow for a quick test. DebugView captures nothing from my BHO.
Why does DebugView not show BHO debug messages? Is it something to do with Internet Explorer running at low integrity level?
Assuming that you're running IE on Vista or later (which it sounds like since you're talking about integrity levels), you can set the integrity level of DebugView to a lower integrity so any application can send messages to it:
icacls dbgview.exe /setintegritylevel low
And if you don't like the idea of permanently setting dbgview to low integrity (it might make saving logs and whatnot a bit of a pain, as they will only go into the low-integrity store) you can run a particular instance of dbgview at low integrity using Sysinternals' psexec tool:
psexec -l dbgview
Finally, if all you're worried about is the amount of time that it takes to load up the VS debugger to attach to the process, you can use a command line debugger (like ntsd.exe or cdb.exe). Ntsd.exe comes with Windows, but a newer version comes with the "Debugging Tools for Windows" package, which also includes the very similar cdb.exe.