I had been using nprof (http://nprof.sourceforge.net) to do some profiling of a WindowsForms app, but it was hitting some really odd timings on a part of the code that relied on an ActiveX EXE (don't ask).
So while searching for another profiler to get a 2nd opinion from, I found this nice “Community Edition...“ It requires registration, but integrates nicely into the IDE...
http://www.compuware.com/products/devpartner/profiler/default.asp?cid=3019X36&focus=DevPartner&source=Web+%2D+Evaluation+Request&desc=Download+%2D+%27DevPartner+Profiler+Community+Edition%27&offering=DevPartner&sf=1&p=0
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