问题
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.
回答1:
FreeCap is your way to go.
It's released under GNU General Public Licence and written in Delphi.
回答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.
来源：https://stackoverflow.com/questions/8946840/how-does-proxifier-work