Internet Connection

Hello,
For a local network, I remote-connect to another computer by inputing his local IP address (e.g 192.168.1.2)
But what if I'd like to use my home computer to connect to that computer at company's office,
I know the static ip the company is using e.g 123.123.123.123
What should I input in the remote connection wizard ?
Thank you

First you should log on to the company network using VPN for instance. Then you connect using the ip or name of the company computer.