你是否要窥探别人的PC？ :-)

你需要一台（可能 TCP ）服务器在计算机上 B 热衷于向您发送（即您的客户端程序）这样的信息。

Are you going to spy someone else's PC? :-)
You need a (possibly TCP) server on computer B keen to sending you (i.e. your client program) such a piece of info.