# Creating Links Between Models and Other Applications

Linking your models to other applications provides an easy way to continually update your model with new values for use in your simulations, or to update the files in other applications with the values of the latest run of your model. It is generally the most practical method when you are bringing in data from a constantly changing source, or when you want to continually update another document with the output from your models. The links will be established through DDE on Windows and Publish and Subscribe on the Macintosh. We will start by outlining the process of establishing links in DDE and follow with a discussion of the same process using Publish and Subscribe.

###### Windows Users See: | ###### Macintosh Users See:
Using DDE (Dynamic Data Exchange) | Using Publish and Subscribe