如何使用msg命令向多台计算机发送消息？

Question

我想使用msg命令向多台计算机发送消息。此命令特定于Windows / DOS。

我知道这些说明：

  

向用户发送消息。

MSG {username | sessionname | sessionid | @filename | *} [/SERVER:servername] [/TIME:seconds] [/V] [/W] [message]

username            Identifies the specified username.
sessionname         The name of the session.
sessionid           The ID of the session.
@filename           Identifies a file containing a list of usernames,
                    sessionnames, and sessionids to send the message to.
*                   Send message to all sessions on specified server.
/SERVER:servername  server to contact (default is current).
/TIME:seconds       Time delay to wait for receiver to acknowledge msg.
/V                  Display information about actions being performed.
/W                  Wait for response from user, useful with /V.
message             Message to send.  If none specified, prompts for it
                    or reads from stdin.

我的问题是：@filename的结构是什么以及如何构建它？

我的网络是工作组。