Why do ZeroMemory, etc. exist when there are memset, etc. already?

Question

Why does ZeroMemory(), and similar calls exist in the Windows API when there are memset and related calls in the C standard library already? Which ones should I

Answer 1

Actually, what you want to use is SecureZeroMemory().

An optimizing compiler can remove calls to memset(), and SecureZeroMemory() is designed to prevent this.

I used to think the ZeroMemory() calls were unnecessary until I came across this fact.