WinHTTP vs. WinINet 3 out of 4 rated this helpful - Rate this topic With a few exceptions, WinINet is a superset of WinHTTP. When selecting between the two, you should use WinINet, unless you plan to run within a service or service-like process that requires impersonation and session isolation. Comparison of features Feature WinINet WinHTTP Credential Cache Allows all built-in..