It's been a while since I did a series of posts on debugging tips:
So here is not so much a tip as an announcement. You see , it's no coincidence that my examples for conditional breakpoints were numbers (some index into a structure is greater than 346, or Xid is 1234.) Until now, you couldn't really use strings in conditional breakpoint expressions. But the cool news is that, starting with Visual Studio 2010, you can!
You can't just call arbitrary functions including your own foo(whatever), but you can call a pretty impressive list of variants on strlen and strcmp. The details on are Habib Heydarian's blog. Just one more reason to want Visual Studio 2010!