EnumProcesses() vs CreateToolhelp32Snapshot()

Question

I was wondering if there are any differences - mostly performance wise - between the two Win32 API functions EnumProcesses() and CreateToolhelp32Snapshot()

Answer 1

IMO the key difference is in priviledges requirements. I've seen cases in which EnumProcesses() would fail, but CreateToolhelp32Snapshot() ran perfectly well.

So once I needed to write code that would detect a certain process on a system and react appropriately. I wrote it using EnumProcesses() and it worked fine on my machine, but not on testers' machines. I just rewrote it with CreateToolhelp32Snapshot() and I've never heard of any problems with it anymore.