# Message Functions

Message functions read text strings from an In-Sight vision system and write text strings to an In-Sight vision system over a Native Mode connection.

- ReadMessage: Reads in a text string sent by a remote network host or serial device using the Send Message command.
- WriteMessage: Writes out a text string whenever ReadMessage is executed. WriteMessage outputs the string over the same connection that is used by the ReadMessage function Functions are tools that are available in Spreadsheet for processing and analyzing acquisitions or other results. You can add functions to your Spreadsheet job to create tool chains and produce results for specific applications..