where can I get more info about TCP/IP in QB64?

[TempodiBasic]

Hello QB64 friends

I was playing with Steve's code about multiscreen using TCP/IP ... but I have no informations about this field of programming, so I am also in learning mode...
where I can get more informations about the use of TCP/IP used in localhost mode?
I have read WIKI and its code examples ....
but how many clients can I connect to a localhost?
I have found no answer to this my dubt.

Thanks for helping.