How does Proxifier work?

Question

As you know Proxifier is a program that allows network applications that do not support working through proxy servers to operate through an HTTPS or SOCKS.

It can handle any transmission from running applications. I want to know how it can do this and how I can write one like that.

Answer 1

FreeCap is your way to go.

It's released under GNU General Public Licence and written in Delphi.

Answer 2

A socksifier defines a dynamic library with the same functions as the OS socket layer, but defined in such a way as to use a socks proxy. The program being socksified uses that library instead of the OS-supplied one for its network communication.