the interface is simply called the "C" one these days

 This document will attempt to describe the general principle and some basic

 approaches to consider when programming with libcurl. The text will focus

 mainly on the C/C++ interface but might apply fairly well on other interfaces

 as well as they usually follow the C one pretty closely.

 mainly on the C interface but might apply fairly well on other interfaces as

 well as they usually follow the C one pretty closely.

 This document will refer to 'the user' as the person writing the source code

 that uses libcurl. That would probably be you or someone in your position.